521292427 has 4 divisors (see below), whose sum is σ = 521614456. Its totient is φ = 520970400.

The previous prime is 521292413. The next prime is 521292449. The reversal of 521292427 is 724292125.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 521292427 - 2²³ = 512903819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521292392 and 521292401.

It is not an unprimeable number, because it can be changed into a prime (521292467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158574 + ... + 161827.

It is an arithmetic number, because the mean of its divisors is an integer number (130403614).

Almost surely, 2^521292427 is an apocalyptic number.

521292427 is a deficient number, since it is larger than the sum of its proper divisors (322029).

521292427 is a wasteful number, since it uses less digits than its factorization.

521292427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322028.

The product of its digits is 20160, while the sum is 34.

The square root of 521292427 is about 22831.8292521646. The cubic root of 521292427 is about 804.8108177792.

The spelling of 521292427 in words is "five hundred twenty-one million, two hundred ninety-two thousand, four hundred twenty-seven".