252455402421 has 12 divisors (see below), whose sum is σ = 364670667660. Its totient is φ = 168297664320.

The previous prime is 252455402411. The next prime is 252455402489. The reversal of 252455402421 is 124204554252.

252455402421 is a `hidden beast` number, since 2 + 5 + 245 + 5 + 402 + 4 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 74755215396 + 177700187025 = 273414^2 + 421545^2 .

It is not a de Polignac number, because 252455402421 - 2¹⁴ = 252455386037 is a prime.

It is a super-2 number, since 2×252455402421² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252455402411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217290 + ... + 743051.

It is an arithmetic number, because the mean of its divisors is an integer number (30389222305).

Almost surely, 2^252455402421 is an apocalyptic number.

It is an amenable number.

252455402421 is a deficient number, since it is larger than the sum of its proper divisors (112215265239).

252455402421 is a wasteful number, since it uses less digits than its factorization.

252455402421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989556 (or 989553 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 36.

Adding to 252455402421 its reverse (124204554252), we get a palindrome (376659956673).

The spelling of 252455402421 in words is "two hundred fifty-two billion, four hundred fifty-five million, four hundred two thousand, four hundred twenty-one".