1397871 has 16 divisors (see below), whose sum is σ = 2161920. Its totient is φ = 891000.

The previous prime is 1397861. The next prime is 1397873. The reversal of 1397871 is 1787931.

It is not a de Polignac number, because 1397871 - 2⁵ = 1397839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 505 + ... + 1746.

It is an arithmetic number, because the mean of its divisors is an integer number (135120).

2^1397871 is an apocalyptic number.

1397871 is a deficient number, since it is larger than the sum of its proper divisors (764049).

1397871 is a wasteful number, since it uses less digits than its factorization.

1397871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2283 (or 2277 counting only the distinct ones).

The product of its digits is 10584, while the sum is 36.

The square root of 1397871 is about 1182.3159476214. The cubic root of 1397871 is about 111.8121585637.

The spelling of 1397871 in words is "one million, three hundred ninety-seven thousand, eight hundred seventy-one".