1250952991 has 2 divisors, whose sum is σ = 1250952992. Its totient is φ = 1250952990.

The previous prime is 1250952977. The next prime is 1250953037. The reversal of 1250952991 is 1992590521.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1250952991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1250952931) 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, 625476495 + 625476496.

It is an arithmetic number, because the mean of its divisors is an integer number (625476496).

Almost surely, 2^1250952991 is an apocalyptic number.

1250952991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1250952991 is an equidigital number, since it uses as much as digits as its factorization.

1250952991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72900, while the sum is 43.

The square root of 1250952991 is about 35368.8138195219. The cubic root of 1250952991 is about 1077.4910297253.

The spelling of 1250952991 in words is "one billion, two hundred fifty million, nine hundred fifty-two thousand, nine hundred ninety-one".