42125780 has 12 divisors (see below), whose sum is σ = 88464180. Its totient is φ = 16850304.

The previous prime is 42125761. The next prime is 42125789. The reversal of 42125780 is 8752124.

It can be written as a sum of positive squares in 2 ways, for example, as 21641104 + 20484676 = 4652^2 + 4526^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42125789) 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 3 ways as a sum of consecutive naturals, for example, 1053125 + ... + 1053164.

It is an arithmetic number, because the mean of its divisors is an integer number (7372015).

Almost surely, 2^42125780 is an apocalyptic number.

It is an amenable number.

42125780 is an abundant number, since it is smaller than the sum of its proper divisors (46338400).

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

42125780 is a wasteful number, since it uses less digits than its factorization.

42125780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2106298 (or 2106296 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 42125780 is about 6490.4375815503. The cubic root of 42125780 is about 347.9493144131.

The spelling of 42125780 in words is "forty-two million, one hundred twenty-five thousand, seven hundred eighty".