1275391 has 16 divisors (see below), whose sum is σ = 1512000. Its totient is φ = 1064448.

The previous prime is 1275361. The next prime is 1275401. The reversal of 1275391 is 1935721.

It is a cyclic number.

It is not a de Polignac number, because 1275391 - 2⁵ = 1275359 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 (1275341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6310 + ... + 6508.

It is an arithmetic number, because the mean of its divisors is an integer number (94500).

2^1275391 is an apocalyptic number.

1275391 is a deficient number, since it is larger than the sum of its proper divisors (236609).

1275391 is a wasteful number, since it uses less digits than its factorization.

1275391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258.

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

The square root of 1275391 is about 1129.3321035019. The cubic root of 1275391 is about 108.4462276110.

The spelling of 1275391 in words is "one million, two hundred seventy-five thousand, three hundred ninety-one".