1276429957 has 8 divisors (see below), whose sum is σ = 1393460640. Its totient is φ = 1159564560.

The previous prime is 1276429943. The next prime is 1276429961. The reversal of 1276429957 is 7599246721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1276429957 - 2²³ = 1268041349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276429907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24883 + ... + 56320.

It is an arithmetic number, because the mean of its divisors is an integer number (174182580).

Almost surely, 2^1276429957 is an apocalyptic number.

It is an amenable number.

1276429957 is a deficient number, since it is larger than the sum of its proper divisors (117030683).

1276429957 is a wasteful number, since it uses less digits than its factorization.

1276429957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82643.

The product of its digits is 1905120, while the sum is 52.

The square root of 1276429957 is about 35727.1599347051. The cubic root of 1276429957 is about 1084.7566705001.

The spelling of 1276429957 in words is "one billion, two hundred seventy-six million, four hundred twenty-nine thousand, nine hundred fifty-seven".