1397409 has 8 divisors (see below), whose sum is σ = 2006592. Its totient is φ = 859920.

The previous prime is 1397359. The next prime is 1397437. The reversal of 1397409 is 9047931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1397409 - 2⁸ = 1397153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1397409.

It is not an unprimeable number, because it can be changed into a prime (1397509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17877 + ... + 17954.

It is an arithmetic number, because the mean of its divisors is an integer number (250824).

2^1397409 is an apocalyptic number.

It is an amenable number.

1397409 is a deficient number, since it is larger than the sum of its proper divisors (609183).

1397409 is a wasteful number, since it uses less digits than its factorization.

1397409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35847.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 1397409 is about 1182.1205522281. The cubic root of 1397409 is about 111.7998391367.

The spelling of 1397409 in words is "one million, three hundred ninety-seven thousand, four hundred nine".