1272161330 has 24 divisors (see below), whose sum is σ = 2516989356. Its totient is φ = 462603680.

The previous prime is 1272161329. The next prime is 1272161333. The reversal of 1272161330 is 331612721.

It can be written as a sum of positive squares in 2 ways, for example, as 1199860321 + 72301009 = 34639^2 + 8503^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1272161330.

It is not an unprimeable number, because it can be changed into a prime (1272161333) 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, 524477 + ... + 526896.

Almost surely, 2^1272161330 is an apocalyptic number.

1272161330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1272161330 is a deficient number, since it is larger than the sum of its proper divisors (1244828026).

1272161330 is a wasteful number, since it uses less digits than its factorization.

1272161330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051402 (or 1051391 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 1272161330 is about 35667.3706628341. The cubic root of 1272161330 is about 1083.5461084761.

The spelling of 1272161330 in words is "one billion, two hundred seventy-two million, one hundred sixty-one thousand, three hundred thirty".