525404140 has 12 divisors (see below), whose sum is σ = 1103348736. Its totient is φ = 210161648.

The previous prime is 525404119. The next prime is 525404147. The reversal of 525404140 is 41404525.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (525404147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13135084 + ... + 13135123.

It is an arithmetic number, because the mean of its divisors is an integer number (91945728).

Almost surely, 2^525404140 is an apocalyptic number.

It is an amenable number.

525404140 is an abundant number, since it is smaller than the sum of its proper divisors (577944596).

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

525404140 is a wasteful number, since it uses less digits than its factorization.

525404140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26270216 (or 26270214 counting only the distinct ones).

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

The square root of 525404140 is about 22921.6958360415. The cubic root of 525404140 is about 806.9212702536.

Adding to 525404140 its reverse (41404525), we get a palindrome (566808665).

The spelling of 525404140 in words is "five hundred twenty-five million, four hundred four thousand, one hundred forty".