1379845 has 4 divisors (see below), whose sum is σ = 1655820. Its totient is φ = 1103872.

The previous prime is 1379821. The next prime is 1379857. The reversal of 1379845 is 5489731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5489731 = 13 ⋅422287.

It can be written as a sum of positive squares in 2 ways, for example, as 351649 + 1028196 = 593^2 + 1014^2 .

It is a cyclic number.

It is not a de Polignac number, because 1379845 - 2⁵ = 1379813 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137980 + ... + 137989.

It is an arithmetic number, because the mean of its divisors is an integer number (413955).

2^1379845 is an apocalyptic number.

It is an amenable number.

1379845 is a deficient number, since it is larger than the sum of its proper divisors (275975).

1379845 is an equidigital number, since it uses as much as digits as its factorization.

1379845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275974.

The product of its digits is 30240, while the sum is 37.

The square root of 1379845 is about 1174.6680382133. The cubic root of 1379845 is about 111.3294597080.

The spelling of 1379845 in words is "one million, three hundred seventy-nine thousand, eight hundred forty-five".