1275275379 has 16 divisors (see below), whose sum is σ = 1943848448. Its totient is φ = 728514432.

The previous prime is 1275275371. The next prime is 1275275401. The reversal of 1275275379 is 9735725721.

It is not a de Polignac number, because 1275275379 - 2³ = 1275275371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1275275371) 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, 89259 + ... + 102555.

It is an arithmetic number, because the mean of its divisors is an integer number (121490528).

Almost surely, 2^1275275379 is an apocalyptic number.

1275275379 is a deficient number, since it is larger than the sum of its proper divisors (668573069).

1275275379 is a wasteful number, since it uses less digits than its factorization.

1275275379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17874.

The product of its digits is 926100, while the sum is 48.

The square root of 1275275379 is about 35710.9980118170. The cubic root of 1275275379 is about 1084.4295043559.

The spelling of 1275275379 in words is "one billion, two hundred seventy-five million, two hundred seventy-five thousand, three hundred seventy-nine".