1249622271 has 12 divisors (see below), whose sum is σ = 1834601080. Its totient is φ = 819424080.

The previous prime is 1249622251. The next prime is 1249622279. The reversal of 1249622271 is 1722269421.

1249622271 = 4784² + 4785² + ... + 4837².

1249622271 is a `hidden beast` number, since 1 + 2 + 4 + 9 + 622 + 27 + 1 = 666.

It is not a de Polignac number, because 1249622271 - 2⁵ = 1249622239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249622279) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1137541 + ... + 1138638.

Almost surely, 2^1249622271 is an apocalyptic number.

1249622271 is a deficient number, since it is larger than the sum of its proper divisors (584978809).

1249622271 is a wasteful number, since it uses less digits than its factorization.

1249622271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276246 (or 2276243 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 1249622271 is about 35349.9967609617. The cubic root of 1249622271 is about 1077.1088284231.

The spelling of 1249622271 in words is "one billion, two hundred forty-nine million, six hundred twenty-two thousand, two hundred seventy-one".