1279625017 has 8 divisors (see below), whose sum is σ = 1398380832. Its totient is φ = 1161273600.

The previous prime is 1279624859. The next prime is 1279625021. The reversal of 1279625017 is 7105269721.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1279625017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1279625117) 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, 94459 + ... + 107152.

It is an arithmetic number, because the mean of its divisors is an integer number (174797604).

Almost surely, 2^1279625017 is an apocalyptic number.

It is an amenable number.

1279625017 is a deficient number, since it is larger than the sum of its proper divisors (118755815).

1279625017 is a wasteful number, since it uses less digits than its factorization.

1279625017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202199.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 1279625017 is about 35771.8467093887. The cubic root of 1279625017 is about 1085.6610091512.

The spelling of 1279625017 in words is "one billion, two hundred seventy-nine million, six hundred twenty-five thousand, seventeen".