52429721 has 4 divisors (see below), whose sum is σ = 55189200. Its totient is φ = 49670244.

The previous prime is 52429687. The next prime is 52429733. The reversal of 52429721 is 12792425.

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-52429721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52429021) 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, 1379711 + ... + 1379748.

It is an arithmetic number, because the mean of its divisors is an integer number (13797300).

Almost surely, 2^52429721 is an apocalyptic number.

It is an amenable number.

52429721 is a deficient number, since it is larger than the sum of its proper divisors (2759479).

52429721 is a wasteful number, since it uses less digits than its factorization.

52429721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2759478.

The product of its digits is 10080, while the sum is 32.

The square root of 52429721 is about 7240.8370372492. The cubic root of 52429721 is about 374.2764620640.

The spelling of 52429721 in words is "fifty-two million, four hundred twenty-nine thousand, seven hundred twenty-one".