1373605 has 12 divisors (see below), whose sum is σ = 1741932. Its totient is φ = 1039680.

The previous prime is 1373591. The next prime is 1373611. The reversal of 1373605 is 5063731.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 159201 + 1214404 = 399^2 + 1102^2 .

It is not a de Polignac number, because 1373605 - 2¹⁵ = 1340837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1373605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1425 + ... + 2185.

It is an arithmetic number, because the mean of its divisors is an integer number (145161).

2^1373605 is an apocalyptic number.

It is an amenable number.

1373605 is a deficient number, since it is larger than the sum of its proper divisors (368327).

1373605 is an equidigital number, since it uses as much as digits as its factorization.

1373605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804 (or 785 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 25.

The square root of 1373605 is about 1172.0089590101. The cubic root of 1373605 is about 111.1613863223.

The spelling of 1373605 in words is "one million, three hundred seventy-three thousand, six hundred five".