1397611 has 4 divisors (see below), whose sum is σ = 1400224. Its totient is φ = 1395000.

The previous prime is 1397609. The next prime is 1397633. The reversal of 1397611 is 1167931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1167931 = 199 ⋅5869.

It is a cyclic number.

It is not a de Polignac number, because 1397611 - 2¹ = 1397609 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 1397611.

It is not an unprimeable number, because it can be changed into a prime (1397681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180 + ... + 1681.

It is an arithmetic number, because the mean of its divisors is an integer number (350056).

2^1397611 is an apocalyptic number.

1397611 is a deficient number, since it is larger than the sum of its proper divisors (2613).

1397611 is an equidigital number, since it uses as much as digits as its factorization.

1397611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612.

The product of its digits is 1134, while the sum is 28.

The square root of 1397611 is about 1182.2059888192. The cubic root of 1397611 is about 111.8052258868.

It can be divided in two parts, 139 and 7611, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 1397611 in words is "one million, three hundred ninety-seven thousand, six hundred eleven".