525135420 has 48 divisors (see below), whose sum is σ = 1633756320. Its totient is φ = 140035968.

The previous prime is 525135419. The next prime is 525135449. The reversal of 525135420 is 24531525.

It is a happy number.

525135420 is a `hidden beast` number, since 525 + 135 + 4 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 485697 + ... + 486776.

It is an arithmetic number, because the mean of its divisors is an integer number (34036590).

Almost surely, 2^525135420 is an apocalyptic number.

It is an amenable number.

525135420 is an abundant number, since it is smaller than the sum of its proper divisors (1108620900).

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

525135420 is a wasteful number, since it uses less digits than its factorization.

525135420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972491 (or 972483 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 525135420 is about 22915.8333909112. The cubic root of 525135420 is about 806.7836791151.

Adding to 525135420 its reverse (24531525), we get a palindrome (549666945).

The spelling of 525135420 in words is "five hundred twenty-five million, one hundred thirty-five thousand, four hundred twenty".