52042921 has 4 divisors (see below), whose sum is σ = 59477632. Its totient is φ = 44608212.

The previous prime is 52042901. The next prime is 52042927. The reversal of 52042921 is 12924025.

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 not a de Polignac number, because 52042921 - 2⁵ = 52042889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52042927) 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, 3717345 + ... + 3717358.

It is an arithmetic number, because the mean of its divisors is an integer number (14869408).

Almost surely, 2^52042921 is an apocalyptic number.

It is an amenable number.

52042921 is a deficient number, since it is larger than the sum of its proper divisors (7434711).

52042921 is an equidigital number, since it uses as much as digits as its factorization.

52042921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7434710.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 52042921 is about 7214.0779729637. The cubic root of 52042921 is about 373.3537817421.

Adding to 52042921 its reverse (12924025), we get a palindrome (64966946).

The spelling of 52042921 in words is "fifty-two million, forty-two thousand, nine hundred twenty-one".