252012991 has 2 divisors, whose sum is σ = 252012992. Its totient is φ = 252012990.

The previous prime is 252012973. The next prime is 252013037. The reversal of 252012991 is 199210252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 252012991 - 2¹⁷ = 251881919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252012911) 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, 126006495 + 126006496.

It is an arithmetic number, because the mean of its divisors is an integer number (126006496).

Almost surely, 2^252012991 is an apocalyptic number.

252012991 is a deficient number, since it is larger than the sum of its proper divisors (1).

252012991 is an equidigital number, since it uses as much as digits as its factorization.

252012991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 252012991 is about 15874.9170391533. The cubic root of 252012991 is about 631.6468135246.

The spelling of 252012991 in words is "two hundred fifty-two million, twelve thousand, nine hundred ninety-one".