1871397 has 16 divisors (see below), whose sum is σ = 3024960. Its totient is φ = 1134000.

The previous prime is 1871383. The next prime is 1871413. The reversal of 1871397 is 7931781.

It is not a de Polignac number, because 1871397 - 2¹⁰ = 1870373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1871327) 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, 2854 + ... + 3447.

It is an arithmetic number, because the mean of its divisors is an integer number (189060).

2^1871397 is an apocalyptic number.

It is an amenable number.

1871397 is a deficient number, since it is larger than the sum of its proper divisors (1153563).

1871397 is a wasteful number, since it uses less digits than its factorization.

1871397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6321 (or 6315 counting only the distinct ones).

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

The square root of 1871397 is about 1367.9901315434. The cubic root of 1871397 is about 123.2315685182.

The spelling of 1871397 in words is "one million, eight hundred seventy-one thousand, three hundred ninety-seven".