42621140 has 24 divisors (see below), whose sum is σ = 91689192. Its totient is φ = 16632320.

The previous prime is 42621133. The next prime is 42621143. The reversal of 42621140 is 4112624.

It can be written as a sum of positive squares in 4 ways, for example, as 1430416 + 41190724 = 1196^2 + 6418^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42621143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25169 + ... + 26808.

It is an arithmetic number, because the mean of its divisors is an integer number (3820383).

Almost surely, 2^42621140 is an apocalyptic number.

It is an amenable number.

42621140 is an abundant number, since it is smaller than the sum of its proper divisors (49068052).

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

42621140 is a wasteful number, since it uses less digits than its factorization.

42621140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52027 (or 52025 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 42621140 is about 6528.4868078292. The cubic root of 42621140 is about 349.3078566423.

Adding to 42621140 its reverse (4112624), we get a palindrome (46733764).

The spelling of 42621140 in words is "forty-two million, six hundred twenty-one thousand, one hundred forty".