1258412816 has 40 divisors (see below), whose sum is σ = 2470258560. Its totient is φ = 620964864.

The previous prime is 1258412797. The next prime is 1258412819. The reversal of 1258412816 is 6182148521.

It is a self number, because there is not a number n which added to its sum of digits gives 1258412816.

It is not an unprimeable number, because it can be changed into a prime (1258412819) 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, 680405 + ... + 682251.

It is an arithmetic number, because the mean of its divisors is an integer number (61756464).

Almost surely, 2^1258412816 is an apocalyptic number.

1258412816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1258412816 is a deficient number, since it is larger than the sum of its proper divisors (1211845744).

1258412816 is a wasteful number, since it uses less digits than its factorization.

1258412816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391 (or 2385 counting only the distinct ones).

The product of its digits is 30720, while the sum is 38.

The square root of 1258412816 is about 35474.1147317308. The cubic root of 1258412816 is about 1079.6285919962.

The spelling of 1258412816 in words is "one billion, two hundred fifty-eight million, four hundred twelve thousand, eight hundred sixteen".