1381392 has 60 divisors (see below), whose sum is σ = 3960684. Its totient is φ = 449280.

The previous prime is 1381381. The next prime is 1381397. The reversal of 1381392 is 2931831.

It can be written as a sum of positive squares in 2 ways, for example, as 389376 + 992016 = 624^2 + 996^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1381397) 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, 7542 + ... + 7722.

2^1381392 is an apocalyptic number.

1381392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1381392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1980342).

1381392 is an abundant number, since it is smaller than the sum of its proper divisors (2579292).

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

1381392 is a wasteful number, since it uses less digits than its factorization.

1381392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 239 counting only the distinct ones).

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

The square root of 1381392 is about 1175.3263376612. The cubic root of 1381392 is about 111.3710494882.

The spelling of 1381392 in words is "one million, three hundred eighty-one thousand, three hundred ninety-two".