1267129056 has 24 divisors (see below), whose sum is σ = 3326214024. Its totient is φ = 422376320.

The previous prime is 1267129013. The next prime is 1267129069. The reversal of 1267129056 is 6509217621.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×1267129056² = 3211232089118902272, which contains 22 as substring.

It is a congruent number.

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, 6599535 + ... + 6599726.

It is an arithmetic number, because the mean of its divisors is an integer number (138592251).

Almost surely, 2^1267129056 is an apocalyptic number.

1267129056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1267129056 is an abundant number, since it is smaller than the sum of its proper divisors (2059084968).

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

1267129056 is a wasteful number, since it uses less digits than its factorization.

1267129056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13199274 (or 13199266 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 1267129056 is about 35596.7562567153. The cubic root of 1267129056 is about 1082.1154968203.

The spelling of 1267129056 in words is "one billion, two hundred sixty-seven million, one hundred twenty-nine thousand, fifty-six".