1257054479 has 2 divisors, whose sum is σ = 1257054480. Its totient is φ = 1257054478.

The previous prime is 1257054457. The next prime is 1257054481. The reversal of 1257054479 is 9744507521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1257054479 - 2⁸ = 1257054223 is a prime.

It is a super-2 number, since 2×1257054479² = 3160371926347922882, which contains 22 as substring.

Together with 1257054481, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1257054419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628527239 + 628527240.

It is an arithmetic number, because the mean of its divisors is an integer number (628527240).

Almost surely, 2^1257054479 is an apocalyptic number.

1257054479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1257054479 is an equidigital number, since it uses as much as digits as its factorization.

1257054479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 352800, while the sum is 44.

The square root of 1257054479 is about 35454.9640953139. The cubic root of 1257054479 is about 1079.2400000043.

The spelling of 1257054479 in words is "one billion, two hundred fifty-seven million, fifty-four thousand, four hundred seventy-nine".