1267129963 has 4 divisors (see below), whose sum is σ = 1382323608. Its totient is φ = 1151936320.

The previous prime is 1267129957. The next prime is 1267129967. The reversal of 1267129963 is 3699217621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1267129963 - 2²⁵ = 1233575531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1267129967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57596806 + ... + 57596827.

It is an arithmetic number, because the mean of its divisors is an integer number (345580902).

Almost surely, 2^1267129963 is an apocalyptic number.

1267129963 is a deficient number, since it is larger than the sum of its proper divisors (115193645).

1267129963 is a wasteful number, since it uses less digits than its factorization.

1267129963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115193644.

The product of its digits is 244944, while the sum is 46.

The square root of 1267129963 is about 35596.7689966379. The cubic root of 1267129963 is about 1082.1157550099.

The spelling of 1267129963 in words is "one billion, two hundred sixty-seven million, one hundred twenty-nine thousand, nine hundred sixty-three".