1257294023 has 2 divisors, whose sum is σ = 1257294024. Its totient is φ = 1257294022.

The previous prime is 1257293993. The next prime is 1257294029. The reversal of 1257294023 is 3204927521.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3204927521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1257294023 - 2²² = 1253099719 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1257294029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628647011 + 628647012.

It is an arithmetic number, because the mean of its divisors is an integer number (628647012).

Almost surely, 2^1257294023 is an apocalyptic number.

1257294023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1257294023 is an equidigital number, since it uses as much as digits as its factorization.

1257294023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 1257294023 is about 35458.3420791215. The cubic root of 1257294023 is about 1079.3085488888.

The spelling of 1257294023 in words is "one billion, two hundred fifty-seven million, two hundred ninety-four thousand, twenty-three".