42525418 has 16 divisors (see below), whose sum is σ = 69823656. Its totient is φ = 19304640.

The previous prime is 42525389. The next prime is 42525419. The reversal of 42525418 is 81452524.

It can be written as a sum of positive squares in 4 ways, for example, as 22212369 + 20313049 = 4713^2 + 4507^2 .

It is a super-2 number, since 2×42525418² = 3616822352149448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42525418.

It is not an unprimeable number, because it can be changed into a prime (42525419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11821 + ... + 14992.

Almost surely, 2^42525418 is an apocalyptic number.

42525418 is a deficient number, since it is larger than the sum of its proper divisors (27298238).

42525418 is a wasteful number, since it uses less digits than its factorization.

42525418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26889.

The product of its digits is 12800, while the sum is 31.

The square root of 42525418 is about 6521.1515854180. The cubic root of 42525418 is about 349.0461593612.

The spelling of 42525418 in words is "forty-two million, five hundred twenty-five thousand, four hundred eighteen".