1275339973 has 4 divisors (see below), whose sum is σ = 1306445868. Its totient is φ = 1244234080.

The previous prime is 1275339943. The next prime is 1275339977. The reversal of 1275339973 is 3799335721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3799335721 = 10037 ⋅378533.

It can be written as a sum of positive squares in 2 ways, for example, as 728622049 + 546717924 = 26993^2 + 23382^2 .

It is a cyclic number.

It is not a de Polignac number, because 1275339973 - 2⁵ = 1275339941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275339977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15552886 + ... + 15552967.

It is an arithmetic number, because the mean of its divisors is an integer number (326611467).

Almost surely, 2^1275339973 is an apocalyptic number.

It is an amenable number.

1275339973 is a deficient number, since it is larger than the sum of its proper divisors (31105895).

1275339973 is an equidigital number, since it uses as much as digits as its factorization.

1275339973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31105894.

The product of its digits is 1071630, while the sum is 49.

The square root of 1275339973 is about 35711.9023996202. The cubic root of 1275339973 is about 1084.4478132007.

The spelling of 1275339973 in words is "one billion, two hundred seventy-five million, three hundred thirty-nine thousand, nine hundred seventy-three".