42491580 has 96 divisors (see below), whose sum is σ = 127346688. Its totient is φ = 10560000.

The previous prime is 42491573. The next prime is 42491587. The reversal of 42491580 is 8519424.

42491580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (42491573) and next prime (42491587).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42491587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56205 + ... + 56955.

It is an arithmetic number, because the mean of its divisors is an integer number (1326528).

Almost surely, 2^42491580 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42491580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63673344).

42491580 is an abundant number, since it is smaller than the sum of its proper divisors (84855108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42491580 is a wasteful number, since it uses less digits than its factorization.

42491580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827 (or 825 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 42491580 is about 6518.5565886935. The cubic root of 42491580 is about 348.9535546822.

It can be divided in two parts, 42491 and 580, that added together give a triangular number (43071 = T₂₉₃).

The spelling of 42491580 in words is "forty-two million, four hundred ninety-one thousand, five hundred eighty".