1275265139 has 8 divisors (see below), whose sum is σ = 1278965760. Its totient is φ = 1271571336.

The previous prime is 1275265127. The next prime is 1275265177. The reversal of 1275265139 is 9315625721.

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-1275265139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1275265096 and 1275265105.

It is not an unprimeable number, because it can be changed into a prime (1275265109) 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, 806852 + ... + 808430.

It is an arithmetic number, because the mean of its divisors is an integer number (159870720).

Almost surely, 2^1275265139 is an apocalyptic number.

1275265139 is a deficient number, since it is larger than the sum of its proper divisors (3700621).

1275265139 is a wasteful number, since it uses less digits than its factorization.

1275265139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3409.

The product of its digits is 113400, while the sum is 41.

The square root of 1275265139 is about 35710.8546383309. The cubic root of 1275265139 is about 1084.4266018226.

The spelling of 1275265139 in words is "one billion, two hundred seventy-five million, two hundred sixty-five thousand, one hundred thirty-nine".