1274391287 has 16 divisors (see below), whose sum is σ = 1387562400. Its totient is φ = 1163430912.

The previous prime is 1274391269. The next prime is 1274391329. The reversal of 1274391287 is 7821934721.

It is a cyclic number.

It is not a de Polignac number, because 1274391287 - 2⁸ = 1274391031 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 (1274394287) 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, 1214339 + ... + 1215387.

It is an arithmetic number, because the mean of its divisors is an integer number (86722650).

Almost surely, 2^1274391287 is an apocalyptic number.

1274391287 is a deficient number, since it is larger than the sum of its proper divisors (113171113).

1274391287 is a wasteful number, since it uses less digits than its factorization.

1274391287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002.

The product of its digits is 169344, while the sum is 44.

The square root of 1274391287 is about 35698.6174382146. The cubic root of 1274391287 is about 1084.1788507585.

The spelling of 1274391287 in words is "one billion, two hundred seventy-four million, three hundred ninety-one thousand, two hundred eighty-seven".