1257125293 has 2 divisors, whose sum is σ = 1257125294. Its totient is φ = 1257125292.

The previous prime is 1257125251. The next prime is 1257125327. The reversal of 1257125293 is 3925217521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 747584964 + 509540329 = 27342^2 + 22573^2 .

It is a cyclic number.

It is not a de Polignac number, because 1257125293 - 2²⁵ = 1223570861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1257125593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628562646 + 628562647.

It is an arithmetic number, because the mean of its divisors is an integer number (628562647).

Almost surely, 2^1257125293 is an apocalyptic number.

It is an amenable number.

1257125293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1257125293 is an equidigital number, since it uses as much as digits as its factorization.

1257125293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 37.

The square root of 1257125293 is about 35455.9627284326. The cubic root of 1257125293 is about 1079.2602653329.

The spelling of 1257125293 in words is "one billion, two hundred fifty-seven million, one hundred twenty-five thousand, two hundred ninety-three".