1272089412 has 36 divisors (see below), whose sum is σ = 3507884016. Its totient is φ = 385481520.

The previous prime is 1272089407. The next prime is 1272089417. The reversal of 1272089412 is 2149802721.

It is an interprime number because it is at equal distance from previous prime (1272089407) and next prime (1272089417).

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1272089412² = 3236422944245011488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1272089417) 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, 1605778 + ... + 1606569.

Almost surely, 2^1272089412 is an apocalyptic number.

1272089412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1272089412 is an abundant number, since it is smaller than the sum of its proper divisors (2235794604).

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

1272089412 is a wasteful number, since it uses less digits than its factorization.

1272089412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3212368 (or 3212363 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1272089412 is about 35666.3624722230. The cubic root of 1272089412 is about 1083.5256896986.

The spelling of 1272089412 in words is "one billion, two hundred seventy-two million, eighty-nine thousand, four hundred twelve".