1381915 has 8 divisors (see below), whose sum is σ = 1664640. Its totient is φ = 1101312.

The previous prime is 1381907. The next prime is 1381921. The reversal of 1381915 is 5191831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1381915 - 2³ = 1381907 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2107 + ... + 2683.

It is an arithmetic number, because the mean of its divisors is an integer number (208080).

2^1381915 is an apocalyptic number.

1381915 is a deficient number, since it is larger than the sum of its proper divisors (282725).

1381915 is an equidigital number, since it uses as much as digits as its factorization.

1381915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061.

The product of its digits is 1080, while the sum is 28.

The square root of 1381915 is about 1175.5488080042. The cubic root of 1381915 is about 111.3851028753.

The spelling of 1381915 in words is "one million, three hundred eighty-one thousand, nine hundred fifteen".