1397635 has 16 divisors (see below), whose sum is σ = 1769472. Its totient is φ = 1058400.

The previous prime is 1397633. The next prime is 1397657. The reversal of 1397635 is 5367931.

It is not a de Polignac number, because 1397635 - 2¹ = 1397633 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 1397635.

It is not an unprimeable number, because it can be changed into a prime (1397633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10942 + ... + 11068.

It is an arithmetic number, because the mean of its divisors is an integer number (110592).

2^1397635 is an apocalyptic number.

1397635 is a deficient number, since it is larger than the sum of its proper divisors (371837).

1397635 is a wasteful number, since it uses less digits than its factorization.

1397635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234.

The product of its digits is 17010, while the sum is 34.

The square root of 1397635 is about 1182.2161392910. The cubic root of 1397635 is about 111.8058658622.

Subtracting from 1397635 its product of digits (17010), we obtain a square (1380625 = 1175²).

The spelling of 1397635 in words is "one million, three hundred ninety-seven thousand, six hundred thirty-five".