1258079457 has 4 divisors (see below), whose sum is σ = 1677439280. Its totient is φ = 838719636.

The previous prime is 1258079443. The next prime is 1258079467. The reversal of 1258079457 is 7549708521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7549708521 = 3 ⋅2516569507.

It is not a de Polignac number, because 1258079457 - 2¹⁰ = 1258078433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1258079467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209679907 + ... + 209679912.

It is an arithmetic number, because the mean of its divisors is an integer number (419359820).

Almost surely, 2^1258079457 is an apocalyptic number.

It is an amenable number.

1258079457 is a deficient number, since it is larger than the sum of its proper divisors (419359823).

1258079457 is an equidigital number, since it uses as much as digits as its factorization.

1258079457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419359822.

The product of its (nonzero) digits is 705600, while the sum is 48.

The square root of 1258079457 is about 35469.4157972753. The cubic root of 1258079457 is about 1079.5332508151.

The spelling of 1258079457 in words is "one billion, two hundred fifty-eight million, seventy-nine thousand, four hundred fifty-seven".