1254665868 has 24 divisors (see below), whose sum is σ = 2995637568. Its totient is φ = 408495696.

The previous prime is 1254665861. The next prime is 1254665899. The reversal of 1254665868 is 8685664521.

It is a self number, because there is not a number n which added to its sum of digits gives 1254665868.

It is not an unprimeable number, because it can be changed into a prime (1254665861) 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, 1215246 + ... + 1216277.

It is an arithmetic number, because the mean of its divisors is an integer number (124818232).

Almost surely, 2^1254665868 is an apocalyptic number.

It is an amenable number.

1254665868 is an abundant number, since it is smaller than the sum of its proper divisors (1740971700).

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

1254665868 is a wasteful number, since it uses less digits than its factorization.

1254665868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431573 (or 2431571 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 51.

The square root of 1254665868 is about 35421.2629362647. The cubic root of 1254665868 is about 1078.5559885297. Note that the first 3 decimals are identical.

The spelling of 1254665868 in words is "one billion, two hundred fifty-four million, six hundred sixty-five thousand, eight hundred sixty-eight".