1371997 has 8 divisors (see below), whose sum is σ = 1537632. Its totient is φ = 1213200.

The previous prime is 1371991. The next prime is 1372027. The reversal of 1371997 is 7991731.

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 1371997 - 2³ = 1371989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a pancake number, because a pancake can be divided into 1371997 parts by 1656 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1371991) 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, 1279 + ... + 2092.

It is an arithmetic number, because the mean of its divisors is an integer number (192204).

2^1371997 is an apocalyptic number.

It is an amenable number.

1371997 is a deficient number, since it is larger than the sum of its proper divisors (165635).

1371997 is a wasteful number, since it uses less digits than its factorization.

1371997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3419.

The product of its digits is 11907, while the sum is 37.

The square root of 1371997 is about 1171.3227565449. The cubic root of 1371997 is about 111.1179926479.

It can be divided in two parts, 13 and 71997, that added together give a triangular number (72010 = T₃₇₉).

The spelling of 1371997 in words is "one million, three hundred seventy-one thousand, nine hundred ninety-seven".