1396661 has 4 divisors (see below), whose sum is σ = 1596192. Its totient is φ = 1197132.

The previous prime is 1396657. The next prime is 1396663. The reversal of 1396661 is 1666931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1396661 - 2² = 1396657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1396663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99755 + ... + 99768.

It is an arithmetic number, because the mean of its divisors is an integer number (399048).

2^1396661 is an apocalyptic number.

It is an amenable number.

1396661 is a deficient number, since it is larger than the sum of its proper divisors (199531).

1396661 is an equidigital number, since it uses as much as digits as its factorization.

1396661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199530.

The product of its digits is 5832, while the sum is 32.

The square root of 1396661 is about 1181.8041292871. The cubic root of 1396661 is about 111.7798876395.

The spelling of 1396661 in words is "one million, three hundred ninety-six thousand, six hundred sixty-one".