252726921 has 12 divisors (see below), whose sum is σ = 380922048. Its totient is φ = 161159064.

The previous prime is 252726917. The next prime is 252726937. The reversal of 252726921 is 129627252.

It is a happy number.

It is not a de Polignac number, because 252726921 - 2² = 252726917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (252726821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 610245 + ... + 610658.

It is an arithmetic number, because the mean of its divisors is an integer number (31743504).

Almost surely, 2^252726921 is an apocalyptic number.

It is an amenable number.

252726921 is a deficient number, since it is larger than the sum of its proper divisors (128195127).

252726921 is a wasteful number, since it uses less digits than its factorization.

252726921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220932 (or 1220929 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 252726921 is about 15897.3872381596. The cubic root of 252726921 is about 632.2427172538.

The spelling of 252726921 in words is "two hundred fifty-two million, seven hundred twenty-six thousand, nine hundred twenty-one".