1272064340 has 12 divisors (see below), whose sum is σ = 2671335156. Its totient is φ = 508825728.

The previous prime is 1272064337. The next prime is 1272064349. The reversal of 1272064340 is 434602721.

It can be written as a sum of positive squares in 2 ways, for example, as 458902084 + 813162256 = 21422^2 + 28516^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272064349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31801589 + ... + 31801628.

It is an arithmetic number, because the mean of its divisors is an integer number (222611263).

Almost surely, 2^1272064340 is an apocalyptic number.

1272064340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1272064340 is an abundant number, since it is smaller than the sum of its proper divisors (1399270816).

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

1272064340 is a wasteful number, since it uses less digits than its factorization.

1272064340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63603226 (or 63603224 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 1272064340 is about 35666.0109908579. The cubic root of 1272064340 is about 1083.5185711386.

The spelling of 1272064340 in words is "one billion, two hundred seventy-two million, sixty-four thousand, three hundred forty".