252553421 has 4 divisors (see below), whose sum is σ = 252710844. Its totient is φ = 252396000.

The previous prime is 252553391. The next prime is 252553471. The reversal of 252553421 is 124355252.

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

It can be written as a sum of positive squares in 2 ways, for example, as 108889225 + 143664196 = 10435^2 + 11986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252553421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252553471) 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, 76280 + ... + 79521.

It is an arithmetic number, because the mean of its divisors is an integer number (63177711).

Almost surely, 2^252553421 is an apocalyptic number.

It is an amenable number.

252553421 is a deficient number, since it is larger than the sum of its proper divisors (157423).

252553421 is a wasteful number, since it uses less digits than its factorization.

252553421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157422.

The product of its digits is 12000, while the sum is 29.

The square root of 252553421 is about 15891.9294297451. The cubic root of 252553421 is about 632.0980034488.

The spelling of 252553421 in words is "two hundred fifty-two million, five hundred fifty-three thousand, four hundred twenty-one".