252621371 has 2 divisors, whose sum is σ = 252621372. Its totient is φ = 252621370.

The previous prime is 252621323. The next prime is 252621409. The reversal of 252621371 is 173126252.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 252621371 - 2¹⁴ = 252604987 is a prime.

It is not a weakly prime, because it can be changed into another prime (252627371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126310685 + 126310686.

It is an arithmetic number, because the mean of its divisors is an integer number (126310686).

Almost surely, 2^252621371 is an apocalyptic number.

252621371 is a deficient number, since it is larger than the sum of its proper divisors (1).

252621371 is an equidigital number, since it uses as much as digits as its factorization.

252621371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 252621371 is about 15894.0671635677. The cubic root of 252621371 is about 632.1546874403.

The spelling of 252621371 in words is "two hundred fifty-two million, six hundred twenty-one thousand, three hundred seventy-one".