1257251959 has 2 divisors, whose sum is σ = 1257251960. Its totient is φ = 1257251958.

The previous prime is 1257251929. The next prime is 1257252011. The reversal of 1257251959 is 9591527521.

It is a weak prime.

It is an emirp because it is prime and its reverse (9591527521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1257251959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1257251929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628625979 + 628625980.

It is an arithmetic number, because the mean of its divisors is an integer number (628625980).

Almost surely, 2^1257251959 is an apocalyptic number.

1257251959 is a deficient number, since it is larger than the sum of its proper divisors (1).

1257251959 is an equidigital number, since it uses as much as digits as its factorization.

1257251959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 283500, while the sum is 46.

The square root of 1257251959 is about 35457.7489274206. The cubic root of 1257251959 is about 1079.2965123138.

The spelling of 1257251959 in words is "one billion, two hundred fifty-seven million, two hundred fifty-one thousand, nine hundred fifty-nine".