525465621 has 6 divisors (see below), whose sum is σ = 759005910. Its totient is φ = 350310408.

The previous prime is 525465617. The next prime is 525465643. The reversal of 525465621 is 126564525.

525465621 is a `hidden beast` number, since 5 + 25 + 4 + 6 + 5 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 473062500 + 52403121 = 21750^2 + 7239^2 .

It is not a de Polignac number, because 525465621 - 2² = 525465617 is a prime.

It is a super-2 number, since 2×525465621² = 552228237705831282, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525465671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29192526 + ... + 29192543.

It is an arithmetic number, because the mean of its divisors is an integer number (126500985).

Almost surely, 2^525465621 is an apocalyptic number.

It is an amenable number.

525465621 is a deficient number, since it is larger than the sum of its proper divisors (233540289).

525465621 is a wasteful number, since it uses less digits than its factorization.

525465621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58385075 (or 58385072 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 525465621 is about 22923.0369061344. The cubic root of 525465621 is about 806.9527434174.

The spelling of 525465621 in words is "five hundred twenty-five million, four hundred sixty-five thousand, six hundred twenty-one".