1272656210 has 32 divisors (see below), whose sum is σ = 2772040320. Its totient is φ = 410671872.

The previous prime is 1272656207. The next prime is 1272656221. The reversal of 1272656210 is 126562721.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 533540 + ... + 535919.

It is an arithmetic number, because the mean of its divisors is an integer number (86626260).

Almost surely, 2^1272656210 is an apocalyptic number.

1272656210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1272656210 is an abundant number, since it is smaller than the sum of its proper divisors (1499384110).

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

1272656210 is a wasteful number, since it uses less digits than its factorization.

1272656210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069490.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1272656210 is about 35674.3074214483. The cubic root of 1272656210 is about 1083.6865926974.

The spelling of 1272656210 in words is "one billion, two hundred seventy-two million, six hundred fifty-six thousand, two hundred ten".