1381872 has 20 divisors (see below), whose sum is σ = 3569960. Its totient is φ = 460608.

The previous prime is 1381871. The next prime is 1381883. The reversal of 1381872 is 2781831.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14347 + ... + 14442.

It is an arithmetic number, because the mean of its divisors is an integer number (178498).

2^1381872 is an apocalyptic number.

1381872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1381872 is an abundant number, since it is smaller than the sum of its proper divisors (2188088).

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

1381872 is a wasteful number, since it uses less digits than its factorization.

1381872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28800 (or 28794 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 1381872 is about 1175.5305185320. The cubic root of 1381872 is about 111.3839475681.

The spelling of 1381872 in words is "one million, three hundred eighty-one thousand, eight hundred seventy-two".