1381992 has 32 divisors (see below), whose sum is σ = 3499200. Its totient is φ = 454784.

The previous prime is 1381979. The next prime is 1381993. The reversal of 1381992 is 2991831.

It is not an unprimeable number, because it can be changed into a prime (1381993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1813 + ... + 2459.

It is an arithmetic number, because the mean of its divisors is an integer number (109350).

2^1381992 is an apocalyptic number.

1381992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1381992 is an abundant number, since it is smaller than the sum of its proper divisors (2117208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1381992 is a wasteful number, since it uses less digits than its factorization.

1381992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745 (or 741 counting only the distinct ones).

The product of its digits is 3888, while the sum is 33.

The square root of 1381992 is about 1175.5815582085. The cubic root of 1381992 is about 111.3871716214.

The spelling of 1381992 in words is "one million, three hundred eighty-one thousand, nine hundred ninety-two".