1258495871 has 8 divisors (see below), whose sum is σ = 1299775488. Its totient is φ = 1217259000.

The previous prime is 1258495859. The next prime is 1258495879. The reversal of 1258495871 is 1785948521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1258495871 - 2¹⁴ = 1258479487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1258495879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55826 + ... + 75056.

It is an arithmetic number, because the mean of its divisors is an integer number (162471936).

Almost surely, 2^1258495871 is an apocalyptic number.

1258495871 is a deficient number, since it is larger than the sum of its proper divisors (41279617).

1258495871 is a wasteful number, since it uses less digits than its factorization.

1258495871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21373.

The product of its digits is 806400, while the sum is 50.

The square root of 1258495871 is about 35475.2853547368. The cubic root of 1258495871 is about 1079.6523432324.

The spelling of 1258495871 in words is "one billion, two hundred fifty-eight million, four hundred ninety-five thousand, eight hundred seventy-one".