1275113649 has 8 divisors (see below), whose sum is σ = 1725527200. Its totient is φ = 837387936.

The previous prime is 1275113633. The next prime is 1275113657. The reversal of 1275113649 is 9463115721.

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

It is not a de Polignac number, because 1275113649 - 2⁴ = 1275113633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1275113659) 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, 3171724 + ... + 3172125.

It is an arithmetic number, because the mean of its divisors is an integer number (215690900).

Almost surely, 2^1275113649 is an apocalyptic number.

It is an amenable number.

1275113649 is a deficient number, since it is larger than the sum of its proper divisors (450413551).

1275113649 is an equidigital number, since it uses as much as digits as its factorization.

1275113649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6343919.

The product of its digits is 45360, while the sum is 39.

The square root of 1275113649 is about 35708.7335115655. The cubic root of 1275113649 is about 1084.3836600880.

The spelling of 1275113649 in words is "one billion, two hundred seventy-five million, one hundred thirteen thousand, six hundred forty-nine".