1392381 has 12 divisors (see below), whose sum is σ = 2040480. Its totient is φ = 914760.

The previous prime is 1392379. The next prime is 1392407. The reversal of 1392381 is 1832931.

It is not a de Polignac number, because 1392381 - 2¹ = 1392379 is a prime.

It is a super-2 number, since 2×1392381² = 3877449698322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 451 + ... + 1728.

It is an arithmetic number, because the mean of its divisors is an integer number (170040).

2^1392381 is an apocalyptic number.

It is an amenable number.

1392381 is a deficient number, since it is larger than the sum of its proper divisors (648099).

1392381 is a wasteful number, since it uses less digits than its factorization.

1392381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256 (or 2253 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 1392381 is about 1179.9919491251. The cubic root of 1392381 is about 111.6655894552.

The spelling of 1392381 in words is "one million, three hundred ninety-two thousand, three hundred eighty-one".