1272487551 has 16 divisors (see below), whose sum is σ = 1795939200. Its totient is φ = 799180128.

The previous prime is 1272487529. The next prime is 1272487561. The reversal of 1272487551 is 1557842721.

It is not a de Polignac number, because 1272487551 - 2⁷ = 1272487423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272487501) 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, 52156 + ... + 72561.

It is an arithmetic number, because the mean of its divisors is an integer number (112246200).

Almost surely, 2^1272487551 is an apocalyptic number.

1272487551 is a deficient number, since it is larger than the sum of its proper divisors (523451649).

1272487551 is a wasteful number, since it uses less digits than its factorization.

1272487551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124918.

The product of its digits is 156800, while the sum is 42.

The square root of 1272487551 is about 35671.9434710250. The cubic root of 1272487551 is about 1083.6387186603.

The spelling of 1272487551 in words is "one billion, two hundred seventy-two million, four hundred eighty-seven thousand, five hundred fifty-one".