1391379 has 12 divisors (see below), whose sum is σ = 2039688. Its totient is φ = 843040.

The previous prime is 1391363. The next prime is 1391381. The reversal of 1391379 is 9731931.

It is not a de Polignac number, because 1391379 - 2⁴ = 1391363 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1391479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1554 + ... + 2279.

It is an arithmetic number, because the mean of its divisors is an integer number (169974).

2^1391379 is an apocalyptic number.

1391379 is a deficient number, since it is larger than the sum of its proper divisors (648309).

1391379 is a wasteful number, since it uses less digits than its factorization.

1391379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3858 (or 3847 counting only the distinct ones).

The product of its digits is 5103, while the sum is 33.

The square root of 1391379 is about 1179.5672935445. The cubic root of 1391379 is about 111.6387970349.

It can be divided in two parts, 1391 and 379, that added together give a triangular number (1770 = T₅₉).

The spelling of 1391379 in words is "one million, three hundred ninety-one thousand, three hundred seventy-nine".