1258398879 has 8 divisors (see below), whose sum is σ = 1678033200. Its totient is φ = 838848576.

The previous prime is 1258398851. The next prime is 1258398901. The reversal of 1258398879 is 9788938521.

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

It is not a de Polignac number, because 1258398879 - 2¹² = 1258394783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1258398809) 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, 36219 + ... + 61875.

It is an arithmetic number, because the mean of its divisors is an integer number (209754150).

Almost surely, 2^1258398879 is an apocalyptic number.

1258398879 is a deficient number, since it is larger than the sum of its proper divisors (419634321).

1258398879 is a wasteful number, since it uses less digits than its factorization.

1258398879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42009.

The product of its digits is 8709120, while the sum is 60.

The square root of 1258398879 is about 35473.9182921763. The cubic root of 1258398879 is about 1079.6246063302.

The spelling of 1258398879 in words is "one billion, two hundred fifty-eight million, three hundred ninety-eight thousand, eight hundred seventy-nine".