1250991280117 has 2 divisors, whose sum is σ = 1250991280118. Its totient is φ = 1250991280116.

The previous prime is 1250991280039. The next prime is 1250991280151. The reversal of 1250991280117 is 7110821990521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1212434423236 + 38556856881 = 1101106^2 + 196359^2 .

It is a cyclic number.

It is not a de Polignac number, because 1250991280117 - 2¹⁹ = 1250990755829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1250991280157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625495640058 + 625495640059.

It is an arithmetic number, because the mean of its divisors is an integer number (625495640059).

Almost surely, 2^{1250991280117} is an apocalyptic number.

It is an amenable number.

1250991280117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1250991280117 is an equidigital number, since it uses as much as digits as its factorization.

1250991280117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 46.

The spelling of 1250991280117 in words is "one trillion, two hundred fifty billion, nine hundred ninety-one million, two hundred eighty thousand, one hundred seventeen".