1251276287 has 2 divisors, whose sum is σ = 1251276288. Its totient is φ = 1251276286.

The previous prime is 1251276277. The next prime is 1251276317. The reversal of 1251276287 is 7826721521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1251276287 - 2¹⁴ = 1251259903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251276277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625638143 + 625638144.

It is an arithmetic number, because the mean of its divisors is an integer number (625638144).

Almost surely, 2^1251276287 is an apocalyptic number.

1251276287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251276287 is an equidigital number, since it uses as much as digits as its factorization.

1251276287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 41.

The square root of 1251276287 is about 35373.3838782777. The cubic root of 1251276287 is about 1077.5838439071.

The spelling of 1251276287 in words is "one billion, two hundred fifty-one million, two hundred seventy-six thousand, two hundred eighty-seven".