1258231566 has 24 divisors (see below), whose sum is σ = 2655883944. Its totient is φ = 397335600.

The previous prime is 1258231561. The next prime is 1258231571. The reversal of 1258231566 is 6651328521.

It is an interprime number because it is at equal distance from previous prime (1258231561) and next prime (1258231571).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1258231561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 288285 + ... + 292616.

It is an arithmetic number, because the mean of its divisors is an integer number (110661831).

Almost surely, 2^1258231566 is an apocalyptic number.

1258231566 is an abundant number, since it is smaller than the sum of its proper divisors (1397652378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1258231566 is a wasteful number, since it uses less digits than its factorization.

1258231566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580944 (or 580925 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 1258231566 is about 35471.5599600581. The cubic root of 1258231566 is about 1079.5767563094.

The spelling of 1258231566 in words is "one billion, two hundred fifty-eight million, two hundred thirty-one thousand, five hundred sixty-six".