252645091 has 2 divisors, whose sum is σ = 252645092. Its totient is φ = 252645090.

The previous prime is 252645079. The next prime is 252645121. The reversal of 252645091 is 190546252.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 252645091 - 2¹¹ = 252643043 is a prime.

It is not a weakly prime, because it can be changed into another prime (252645031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126322545 + 126322546.

It is an arithmetic number, because the mean of its divisors is an integer number (126322546).

Almost surely, 2^252645091 is an apocalyptic number.

252645091 is a deficient number, since it is larger than the sum of its proper divisors (1).

252645091 is an equidigital number, since it uses as much as digits as its factorization.

252645091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 252645091 is about 15894.8133364315. The cubic root of 252645091 is about 632.1744723062.

The spelling of 252645091 in words is "two hundred fifty-two million, six hundred forty-five thousand, ninety-one".