1273123316 has 24 divisors (see below), whose sum is σ = 2306556000. Its totient is φ = 614141024.

The previous prime is 1273123309. The next prime is 1273123337. The reversal of 1273123316 is 6133213721.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

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, 184415 + ... + 191193.

It is an arithmetic number, because the mean of its divisors is an integer number (96106500).

Almost surely, 2^1273123316 is an apocalyptic number.

It is an amenable number.

1273123316 is a deficient number, since it is larger than the sum of its proper divisors (1033432684).

1273123316 is a wasteful number, since it uses less digits than its factorization.

1273123316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8431 (or 8429 counting only the distinct ones).

The product of its digits is 4536, while the sum is 29.

The square root of 1273123316 is about 35680.8536332863. The cubic root of 1273123316 is about 1083.8191591591.

The spelling of 1273123316 in words is "one billion, two hundred seventy-three million, one hundred twenty-three thousand, three hundred sixteen".