507942121 has 4 divisors (see below), whose sum is σ = 508017744. Its totient is φ = 507866500.

The previous prime is 507942109. The next prime is 507942139. The reversal of 507942121 is 121249705.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-507942121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (507942191) 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, 26635 + ... + 41536.

It is an arithmetic number, because the mean of its divisors is an integer number (127004436).

Almost surely, 2^507942121 is an apocalyptic number.

It is an amenable number.

507942121 is a deficient number, since it is larger than the sum of its proper divisors (75623).

507942121 is an equidigital number, since it uses as much as digits as its factorization.

507942121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75622.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 507942121 is about 22537.5713199093. The cubic root of 507942121 is about 797.8809131490.

The spelling of 507942121 in words is "five hundred seven million, nine hundred forty-two thousand, one hundred twenty-one".