1396409 has 4 divisors (see below), whose sum is σ = 1595904. Its totient is φ = 1196916.

The previous prime is 1396393. The next prime is 1396411. The reversal of 1396409 is 9046931.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9046931 = 1381 ⋅6551.

It is not a de Polignac number, because 1396409 - 2⁴ = 1396393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1396429) 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, 99737 + ... + 99750.

It is an arithmetic number, because the mean of its divisors is an integer number (398976).

2^1396409 is an apocalyptic number.

It is an amenable number.

1396409 is a deficient number, since it is larger than the sum of its proper divisors (199495).

1396409 is an equidigital number, since it uses as much as digits as its factorization.

1396409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199494.

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

The square root of 1396409 is about 1181.6975078251. The cubic root of 1396409 is about 111.7731644079.

The spelling of 1396409 in words is "one million, three hundred ninety-six thousand, four hundred nine".