1272029696 has 120 divisors (see below), whose sum is σ = 3026639616. Its totient is φ = 522639360.

The previous prime is 1272029659. The next prime is 1272029699. The reversal of 1272029696 is 6969202721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272029699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11888075 + ... + 11888181.

Almost surely, 2^1272029696 is an apocalyptic number.

1272029696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1272029696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1513319808).

1272029696 is an abundant number, since it is smaller than the sum of its proper divisors (1754609920).

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

1272029696 is an frugal number, since it uses more digits than its factorization.

1272029696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 1272029696 is about 35665.5253150714. The cubic root of 1272029696 is about 1083.5087346974.

The spelling of 1272029696 in words is "one billion, two hundred seventy-two million, twenty-nine thousand, six hundred ninety-six".