1125391 has 2 divisors, whose sum is σ = 1125392. Its totient is φ = 1125390.

The previous prime is 1125379. The next prime is 1125401. The reversal of 1125391 is 1935211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1125391 - 2⁵ = 1125359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1125361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562695 + 562696.

It is an arithmetic number, because the mean of its divisors is an integer number (562696).

2^1125391 is an apocalyptic number.

1125391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125391 is an equidigital number, since it uses as much as digits as its factorization.

1125391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 22.

The square root of 1125391 is about 1060.8444749349. The cubic root of 1125391 is about 104.0162388351.

The spelling of 1125391 in words is "one million, one hundred twenty-five thousand, three hundred ninety-one".