1396645 has 4 divisors (see below), whose sum is σ = 1675980. Its totient is φ = 1117312.

The previous prime is 1396627. The next prime is 1396657. The reversal of 1396645 is 5466931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5466931 = 103 ⋅53077.

It can be written as a sum of positive squares in 2 ways, for example, as 1028196 + 368449 = 1014^2 + 607^2 .

It is a cyclic number.

It is not a de Polignac number, because 1396645 - 2⁵ = 1396613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1396645.

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, 139660 + ... + 139669.

It is an arithmetic number, because the mean of its divisors is an integer number (418995).

2^1396645 is an apocalyptic number.

It is an amenable number.

1396645 is a deficient number, since it is larger than the sum of its proper divisors (279335).

1396645 is an equidigital number, since it uses as much as digits as its factorization.

1396645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279334.

The product of its digits is 19440, while the sum is 34.

The square root of 1396645 is about 1181.7973599564. The cubic root of 1396645 is about 111.7794607917.

The spelling of 1396645 in words is "one million, three hundred ninety-six thousand, six hundred forty-five".