1391125 has 16 divisors (see below), whose sum is σ = 1797120. Its totient is φ = 1074000.

The previous prime is 1391119. The next prime is 1391129. The reversal of 1391125 is 5211931.

It is a de Polignac number, because none of the positive numbers 2^k-1391125 is a prime.

1391125 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1391096 and 1391105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391129) 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, 3696 + ... + 4054.

It is an arithmetic number, because the mean of its divisors is an integer number (112320).

2^1391125 is an apocalyptic number.

It is an amenable number.

1391125 is a deficient number, since it is larger than the sum of its proper divisors (405995).

1391125 is an equidigital number, since it uses as much as digits as its factorization.

1391125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 395 counting only the distinct ones).

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

The square root of 1391125 is about 1179.4596220304. The cubic root of 1391125 is about 111.6320033000.

The spelling of 1391125 in words is "one million, three hundred ninety-one thousand, one hundred twenty-five".