1294123272 has 64 divisors (see below), whose sum is σ = 3596597760. Its totient is φ = 385344000.

The previous prime is 1294123261. The next prime is 1294123273. The reversal of 1294123272 is 2723214921.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (1294123273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57229 + ... + 76572.

It is an arithmetic number, because the mean of its divisors is an integer number (56196840).

Almost surely, 2^1294123272 is an apocalyptic number.

1294123272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1294123272 is an abundant number, since it is smaller than the sum of its proper divisors (2302474488).

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

1294123272 is a wasteful number, since it uses less digits than its factorization.

1294123272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133854 (or 133850 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 1294123272 is about 35973.9248901201. The cubic root of 1294123272 is about 1089.7458296906.

The spelling of 1294123272 in words is "one billion, two hundred ninety-four million, one hundred twenty-three thousand, two hundred seventy-two".