1291464456 has 16 divisors (see below), whose sum is σ = 3228661200. Its totient is φ = 430488144.

The previous prime is 1291464443. The next prime is 1291464469. The reversal of 1291464456 is 6544641921.

It is an interprime number because it is at equal distance from previous prime (1291464443) and next prime (1291464469).

It is a super-2 number, since 2×1291464456² = 3335760882222751872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26905486 + ... + 26905533.

It is an arithmetic number, because the mean of its divisors is an integer number (201791325).

Almost surely, 2^1291464456 is an apocalyptic number.

It is an amenable number.

1291464456 is an abundant number, since it is smaller than the sum of its proper divisors (1937196744).

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

1291464456 is a wasteful number, since it uses less digits than its factorization.

1291464456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53811028 (or 53811024 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 1291464456 is about 35936.9511227650. The cubic root of 1291464456 is about 1088.9990125809. Note that the first 3 decimals are identical.

The spelling of 1291464456 in words is "one billion, two hundred ninety-one million, four hundred sixty-four thousand, four hundred fifty-six".