521087401 has 8 divisors (see below), whose sum is σ = 538159104. Its totient is φ = 504032160.

The previous prime is 521087387. The next prime is 521087443. The reversal of 521087401 is 104780125.

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-521087401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 521087401.

It is not an unprimeable number, because it can be changed into a prime (521087461) 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, 124200 + ... + 128326.

It is an arithmetic number, because the mean of its divisors is an integer number (67269888).

Almost surely, 2^521087401 is an apocalyptic number.

It is an amenable number.

521087401 is a deficient number, since it is larger than the sum of its proper divisors (17071703).

521087401 is a wasteful number, since it uses less digits than its factorization.

521087401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8231.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 521087401 is about 22827.3388944047. The cubic root of 521087401 is about 804.7052923764.

The spelling of 521087401 in words is "five hundred twenty-one million, eighty-seven thousand, four hundred one".