525641921 has 32 divisors (see below), whose sum is σ = 664381440. Its totient is φ = 405504000.

The previous prime is 525641899. The next prime is 525641923. The reversal of 525641921 is 129146525.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 525641921 - 2²² = 521447617 is a prime.

It is a super-2 number, since 2×525641921² = 552598858225140482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (525641923) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 327521 + ... + 329121.

It is an arithmetic number, because the mean of its divisors is an integer number (20761920).

Almost surely, 2^525641921 is an apocalyptic number.

It is an amenable number.

525641921 is a deficient number, since it is larger than the sum of its proper divisors (138739519).

525641921 is a wasteful number, since it uses less digits than its factorization.

525641921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745.

The product of its digits is 21600, while the sum is 35.

The square root of 525641921 is about 22926.8820601494. The cubic root of 525641921 is about 807.0429807583.

The spelling of 525641921 in words is "five hundred twenty-five million, six hundred forty-one thousand, nine hundred twenty-one".