521085401 has 8 divisors (see below), whose sum is σ = 551401344. Its totient is φ = 491407840.

The previous prime is 521085379. The next prime is 521085403. The reversal of 521085401 is 104580125.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521085401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521085403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157916 + ... + 161181.

It is an arithmetic number, because the mean of its divisors is an integer number (68925168).

Almost surely, 2^521085401 is an apocalyptic number.

It is an amenable number.

521085401 is a deficient number, since it is larger than the sum of its proper divisors (30315943).

521085401 is a wasteful number, since it uses less digits than its factorization.

521085401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319191.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 521085401 is about 22827.2950872415. The cubic root of 521085401 is about 804.7042628545.

The spelling of 521085401 in words is "five hundred twenty-one million, eighty-five thousand, four hundred one".