1251410402981 has 2 divisors, whose sum is σ = 1251410402982. Its totient is φ = 1251410402980.

The previous prime is 1251410402951. The next prime is 1251410403007. The reversal of 1251410402981 is 1892040141521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 812359716100 + 439050686881 = 901310^2 + 662609^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251410402981 - 2¹⁰ = 1251410401957 is a prime.

It is a super-2 number, since 2×1251410402981² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251410402951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625705201490 + 625705201491.

It is an arithmetic number, because the mean of its divisors is an integer number (625705201491).

Almost surely, 2^{1251410402981} is an apocalyptic number.

It is an amenable number.

1251410402981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251410402981 is an equidigital number, since it uses as much as digits as its factorization.

1251410402981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 38.

The spelling of 1251410402981 in words is "one trillion, two hundred fifty-one billion, four hundred ten million, four hundred two thousand, nine hundred eighty-one".