1272322340 has 12 divisors (see below), whose sum is σ = 2671876956. Its totient is φ = 508928928.

The previous prime is 1272322339. The next prime is 1272322357. The reversal of 1272322340 is 432232721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 594969664 + 677352676 = 24392^2 + 26026^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31808039 + ... + 31808078.

It is an arithmetic number, because the mean of its divisors is an integer number (222656413).

Almost surely, 2^1272322340 is an apocalyptic number.

1272322340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1272322340 is an abundant number, since it is smaller than the sum of its proper divisors (1399554616).

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

1272322340 is a wasteful number, since it uses less digits than its factorization.

1272322340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63616126 (or 63616124 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 1272322340 is about 35669.6276964030. The cubic root of 1272322340 is about 1083.5918192402.

The spelling of 1272322340 in words is "one billion, two hundred seventy-two million, three hundred twenty-two thousand, three hundred forty".