1397845 has 8 divisors (see below), whose sum is σ = 1685376. Its totient is φ = 1112976.

The previous prime is 1397839. The next prime is 1397857. The reversal of 1397845 is 5487931.

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

It is a cyclic number.

It is not a de Polignac number, because 1397845 - 2⁷ = 1397717 is a prime.

It is a Duffinian number.

1397845 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 784 + ... + 1846.

It is an arithmetic number, because the mean of its divisors is an integer number (210672).

2^1397845 is an apocalyptic number.

It is an amenable number.

1397845 is a deficient number, since it is larger than the sum of its proper divisors (287531).

1397845 is a wasteful number, since it uses less digits than its factorization.

1397845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331.

The product of its digits is 30240, while the sum is 37.

The square root of 1397845 is about 1182.3049522014. The cubic root of 1397845 is about 111.8114653347.

The spelling of 1397845 in words is "one million, three hundred ninety-seven thousand, eight hundred forty-five".