1280061456 has 20 divisors (see below), whose sum is σ = 3306825552. Its totient is φ = 426687136.

The previous prime is 1280061439. The next prime is 1280061473. The reversal of 1280061456 is 6541600821.

It is an interprime number because it is at equal distance from previous prime (1280061439) and next prime (1280061473).

It is a super-2 number, since 2×1280061456² = 3277114662273679872, 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, 13333926 + ... + 13334021.

Almost surely, 2^1280061456 is an apocalyptic number.

1280061456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1280061456 is an abundant number, since it is smaller than the sum of its proper divisors (2026764096).

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

1280061456 is a wasteful number, since it uses less digits than its factorization.

1280061456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26667958 (or 26667952 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 1280061456 is about 35777.9465033979. The cubic root of 1280061456 is about 1085.7844231566.

The spelling of 1280061456 in words is "one billion, two hundred eighty million, sixty-one thousand, four hundred fifty-six".