1273332640 has 48 divisors (see below), whose sum is σ = 3185210952. Its totient is φ = 479371264.

The previous prime is 1273332617. The next prime is 1273332653. The reversal of 1273332640 is 462333721.

It can be written as a sum of positive squares in 4 ways, for example, as 1225280016 + 48052624 = 35004^2 + 6932^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231349 + ... + 236788.

Almost surely, 2^1273332640 is an apocalyptic number.

1273332640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1273332640 is an abundant number, since it is smaller than the sum of its proper divisors (1911878312).

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

1273332640 is a wasteful number, since it uses less digits than its factorization.

1273332640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468169 (or 468161 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 31.

The square root of 1273332640 is about 35683.7867945654. The cubic root of 1273332640 is about 1083.8785555863.

The spelling of 1273332640 in words is "one billion, two hundred seventy-three million, three hundred thirty-two thousand, six hundred forty".