1267912799 has 16 divisors (see below), whose sum is σ = 1349524800. Its totient is φ = 1189284096.

The previous prime is 1267912787. The next prime is 1267912801. The reversal of 1267912799 is 9972197621.

It is a cyclic number.

It is not a de Polignac number, because 1267912799 - 2⁸ = 1267912543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1267912799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1267912729) 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, 154307 + ... + 162315.

It is an arithmetic number, because the mean of its divisors is an integer number (84345300).

Almost surely, 2^1267912799 is an apocalyptic number.

1267912799 is a deficient number, since it is larger than the sum of its proper divisors (81612001).

1267912799 is a wasteful number, since it uses less digits than its factorization.

1267912799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8194.

The product of its digits is 857304, while the sum is 53.

The square root of 1267912799 is about 35607.7631844518. The cubic root of 1267912799 is about 1082.3385537238.

The spelling of 1267912799 in words is "one billion, two hundred sixty-seven million, nine hundred twelve thousand, seven hundred ninety-nine".