1373905 has 16 divisors (see below), whose sum is σ = 1854720. Its totient is φ = 969408.

The previous prime is 1373891. The next prime is 1373959. The reversal of 1373905 is 5093731.

It is a cyclic number.

It is not a de Polignac number, because 1373905 - 2⁵ = 1373873 is a prime.

It is a super-2 number, since 2×1373905² = 3775229898050, which contains 22 as substring.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1036 + ... + 1954.

It is an arithmetic number, because the mean of its divisors is an integer number (115920).

2^1373905 is an apocalyptic number.

It is an amenable number.

1373905 is a deficient number, since it is larger than the sum of its proper divisors (480815).

1373905 is a wasteful number, since it uses less digits than its factorization.

1373905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960.

The product of its (nonzero) digits is 2835, while the sum is 28.

The square root of 1373905 is about 1172.1369373926. The cubic root of 1373905 is about 111.1694784080.

It can be divided in two parts, 1373 and 905, that added together give a triangular number (2278 = T₆₇).

The spelling of 1373905 in words is "one million, three hundred seventy-three thousand, nine hundred five".