1272871251 has 48 divisors (see below), whose sum is σ = 1934824320. Its totient is φ = 805633920.

The previous prime is 1272871241. The next prime is 1272871297. The reversal of 1272871251 is 1521782721.

1272871251 is a `hidden beast` number, since 127 + 287 + 1 + 251 = 666.

It is not a de Polignac number, because 1272871251 - 2¹⁴ = 1272854867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1272871241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2442871 + ... + 2443391.

It is an arithmetic number, because the mean of its divisors is an integer number (40308840).

Almost surely, 2^1272871251 is an apocalyptic number.

1272871251 is a deficient number, since it is larger than the sum of its proper divisors (661953069).

1272871251 is a wasteful number, since it uses less digits than its factorization.

1272871251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736 (or 733 counting only the distinct ones).

The product of its digits is 15680, while the sum is 36.

The square root of 1272871251 is about 35677.3212419318. The cubic root of 1272871251 is about 1083.7476261806.

The spelling of 1272871251 in words is "one billion, two hundred seventy-two million, eight hundred seventy-one thousand, two hundred fifty-one".