1275913 has 4 divisors (see below), whose sum is σ = 1319940. Its totient is φ = 1231888.

The previous prime is 1275899. The next prime is 1275931. The reversal of 1275913 is 3195721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3195721 = 73 ⋅43777.

It can be written as a sum of positive squares in 2 ways, for example, as 480249 + 795664 = 693^2 + 892^2 .

It is a cyclic number.

It is not a de Polignac number, because 1275913 - 2⁹ = 1275401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1275973) 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, 21970 + ... + 22027.

It is an arithmetic number, because the mean of its divisors is an integer number (329985).

2^1275913 is an apocalyptic number.

It is an amenable number.

1275913 is a deficient number, since it is larger than the sum of its proper divisors (44027).

1275913 is an equidigital number, since it uses as much as digits as its factorization.

1275913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44026.

The product of its digits is 1890, while the sum is 28.

The square root of 1275913 is about 1129.5631899102. The cubic root of 1275913 is about 108.4610207763.

The spelling of 1275913 in words is "one million, two hundred seventy-five thousand, nine hundred thirteen".