1256925199 has 2 divisors, whose sum is σ = 1256925200. Its totient is φ = 1256925198.

The previous prime is 1256925181. The next prime is 1256925239. The reversal of 1256925199 is 9915296521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1256925199 - 2¹⁷ = 1256794127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1256925119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628462599 + 628462600.

It is an arithmetic number, because the mean of its divisors is an integer number (628462600).

Almost surely, 2^1256925199 is an apocalyptic number.

1256925199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256925199 is an equidigital number, since it uses as much as digits as its factorization.

1256925199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 437400, while the sum is 49.

The square root of 1256925199 is about 35453.1408904768. The cubic root of 1256925199 is about 1079.2030010959.

The spelling of 1256925199 in words is "one billion, two hundred fifty-six million, nine hundred twenty-five thousand, one hundred ninety-nine".