525704401 has 8 divisors (see below), whose sum is σ = 533894984. Its totient is φ = 517570560.

The previous prime is 525704383. The next prime is 525704411. The reversal of 525704401 is 104407525.

It can be written as a sum of positive squares in 4 ways, for example, as 5180176 + 520524225 = 2276^2 + 22815^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 4-Lehmer number, since φ(525704401) divides (525704401-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 525704401 - 2⁷ = 525704273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 525704401.

It is not an unprimeable number, because it can be changed into a prime (525704411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4681 + ... + 32761.

It is an arithmetic number, because the mean of its divisors is an integer number (66736873).

Almost surely, 2^525704401 is an apocalyptic number.

525704401 is the 18721-st pentagonal number.

It is an amenable number.

525704401 is a deficient number, since it is larger than the sum of its proper divisors (8190583).

525704401 is a wasteful number, since it uses less digits than its factorization.

525704401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28371.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 525704401 is about 22928.2446122681. The cubic root of 525704401 is about 807.0749556609.

The spelling of 525704401 in words is "five hundred twenty-five million, seven hundred four thousand, four hundred one".