1273909972 has 12 divisors (see below), whose sum is σ = 2230060896. Its totient is φ = 636749720.

The previous prime is 1273909969. The next prime is 1273909991. The reversal of 1273909972 is 2799093721.

It is a super-2 number, since 2×1273909972² = 3245693233522081568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36904 + ... + 62527.

It is an arithmetic number, because the mean of its divisors is an integer number (185838408).

Almost surely, 2^1273909972 is an apocalyptic number.

It is an amenable number.

1273909972 is a deficient number, since it is larger than the sum of its proper divisors (956150924).

1273909972 is a wasteful number, since it uses less digits than its factorization.

1273909972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102638 (or 102636 counting only the distinct ones).

The product of its (nonzero) digits is 428652, while the sum is 49.

The square root of 1273909972 is about 35691.8754340536. The cubic root of 1273909972 is about 1084.0423418599.

The spelling of 1273909972 in words is "one billion, two hundred seventy-three million, nine hundred nine thousand, nine hundred seventy-two".