252121854 has 8 divisors (see below), whose sum is σ = 504243720. Its totient is φ = 84040616.

The previous prime is 252121847. The next prime is 252121861. The reversal of 252121854 is 458121252.

It is an interprime number because it is at equal distance from previous prime (252121847) and next prime (252121861).

It is a sphenic number, since it is the product of 3 distinct primes.

252121854 is an admirable number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21010149 + ... + 21010160.

It is an arithmetic number, because the mean of its divisors is an integer number (63030465).

Almost surely, 2^252121854 is an apocalyptic number.

252121854 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

252121854 is a wasteful number, since it uses less digits than its factorization.

252121854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42020314.

The product of its digits is 6400, while the sum is 30.

The square root of 252121854 is about 15878.3454427721. The cubic root of 252121854 is about 631.7377520484.

The spelling of 252121854 in words is "two hundred fifty-two million, one hundred twenty-one thousand, eight hundred fifty-four".