42431025 has 48 divisors (see below), whose sum is σ = 86355584. Its totient is φ = 17902080.

The previous prime is 42431003. The next prime is 42431041. The reversal of 42431025 is 52013424.

It is not a de Polignac number, because 42431025 - 2⁶ = 42430961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42430992 and 42431010.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3717 + ... + 9933.

Almost surely, 2^42431025 is an apocalyptic number.

It is an amenable number.

42431025 is an abundant number, since it is smaller than the sum of its proper divisors (43924559).

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

42431025 is a wasteful number, since it uses less digits than its factorization.

42431025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6250 (or 6245 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 42431025 is about 6513.9101160516. The cubic root of 42431025 is about 348.7877106227.

Adding to 42431025 its reverse (52013424), we get a palindrome (94444449).

The spelling of 42431025 in words is "forty-two million, four hundred thirty-one thousand, twenty-five".