252451891 has 2 divisors, whose sum is σ = 252451892. Its totient is φ = 252451890.

The previous prime is 252451889. The next prime is 252451943. The reversal of 252451891 is 198154252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 252451891 - 2¹ = 252451889 is a prime.

Together with 252451889, it forms a pair of twin primes.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 252451891.

It is not a weakly prime, because it can be changed into another prime (252451861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126225945 + 126225946.

It is an arithmetic number, because the mean of its divisors is an integer number (126225946).

Almost surely, 2^252451891 is an apocalyptic number.

252451891 is a deficient number, since it is larger than the sum of its proper divisors (1).

252451891 is an equidigital number, since it uses as much as digits as its factorization.

252451891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 37.

The square root of 252451891 is about 15888.7347199203. The cubic root of 252451891 is about 632.0132880224.

The spelling of 252451891 in words is "two hundred fifty-two million, four hundred fifty-one thousand, eight hundred ninety-one".