252426621 has 4 divisors (see below), whose sum is σ = 336568832. Its totient is φ = 168284412.

The previous prime is 252426593. The next prime is 252426649. The reversal of 252426621 is 126624252.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (252426593) and next prime (252426649).

It is not a de Polignac number, because 252426621 - 2¹⁰ = 252425597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252426221) 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, 42071101 + ... + 42071106.

It is an arithmetic number, because the mean of its divisors is an integer number (84142208).

Almost surely, 2^252426621 is an apocalyptic number.

It is an amenable number.

252426621 is a deficient number, since it is larger than the sum of its proper divisors (84142211).

252426621 is an equidigital number, since it uses as much as digits as its factorization.

252426621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84142210.

The product of its digits is 11520, while the sum is 30.

The square root of 252426621 is about 15887.9394825131. The cubic root of 252426621 is about 631.9921995045.

The spelling of 252426621 in words is "two hundred fifty-two million, four hundred twenty-six thousand, six hundred twenty-one".