42512425 has 18 divisors (see below), whose sum is σ = 53711034. Its totient is φ = 33379200.

The previous prime is 42512419. The next prime is 42512447. The reversal of 42512425 is 52421524.

It can be written as a sum of positive squares in 9 ways, for example, as 27489049 + 15023376 = 5243^2 + 3876^2 .

It is not a de Polignac number, because 42512425 - 2³ = 42512417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42512425.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 92797 + ... + 93253.

Almost surely, 2^42512425 is an apocalyptic number.

It is an amenable number.

42512425 is a deficient number, since it is larger than the sum of its proper divisors (11198609).

42512425 is an equidigital number, since it uses as much as digits as its factorization.

42512425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589 (or 523 counting only the distinct ones).

The product of its digits is 3200, while the sum is 25.

The square root of 42512425 is about 6520.1552895617. The cubic root of 42512425 is about 349.0106071439.

Adding to 42512425 its reverse (52421524), we get a palindrome (94933949).

Subtracting 42512425 from its reverse (52421524), we obtain a palindrome (9909099).

The spelling of 42512425 in words is "forty-two million, five hundred twelve thousand, four hundred twenty-five".