1291479755 has 16 divisors (see below), whose sum is σ = 1572825600. Its totient is φ = 1017875040.

The previous prime is 1291479731. The next prime is 1291479769. The reversal of 1291479755 is 5579741921.

It is not a de Polignac number, because 1291479755 - 2²⁰ = 1290431179 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190616 + ... + 197274.

It is an arithmetic number, because the mean of its divisors is an integer number (98301600).

Almost surely, 2^1291479755 is an apocalyptic number.

1291479755 is a deficient number, since it is larger than the sum of its proper divisors (281345845).

1291479755 is an equidigital number, since it uses as much as digits as its factorization.

1291479755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7234.

The product of its digits is 793800, while the sum is 50.

The square root of 1291479755 is about 35937.1639810378. The cubic root of 1291479755 is about 1089.0033127457.

The spelling of 1291479755 in words is "one billion, two hundred ninety-one million, four hundred seventy-nine thousand, seven hundred fifty-five".