252621277 has 2 divisors, whose sum is σ = 252621278. Its totient is φ = 252621276.

The previous prime is 252621251. The next prime is 252621323. The reversal of 252621277 is 772126252.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217444516 + 35176761 = 14746^2 + 5931^2 .

It is a cyclic number.

It is not a de Polignac number, because 252621277 - 2¹¹ = 252619229 is a prime.

It is a super-2 number, since 2×252621277² = 127635019186221458, which contains 22 as substring.

It is equal to p_13814854 and since 252621277 and 13814854 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252621877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126310638 + 126310639.

It is an arithmetic number, because the mean of its divisors is an integer number (126310639).

Almost surely, 2^252621277 is an apocalyptic number.

It is an amenable number.

252621277 is a deficient number, since it is larger than the sum of its proper divisors (1).

252621277 is an equidigital number, since it uses as much as digits as its factorization.

252621277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23520, while the sum is 34.

The square root of 252621277 is about 15894.0642064892. The cubic root of 252621277 is about 632.1546090323.

The spelling of 252621277 in words is "two hundred fifty-two million, six hundred twenty-one thousand, two hundred seventy-seven".