1371681 has 16 divisors (see below), whose sum is σ = 2056320. Its totient is φ = 903600.

The previous prime is 1371661. The next prime is 1371683. The reversal of 1371681 is 1861731.

It is not a de Polignac number, because 1371681 - 2¹⁰ = 1370657 is a prime.

It is a super-2 number, since 2×1371681² = 3763017531522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1371683) 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, 2476 + ... + 2978.

It is an arithmetic number, because the mean of its divisors is an integer number (128520).

2^1371681 is an apocalyptic number.

It is an amenable number.

1371681 is a deficient number, since it is larger than the sum of its proper divisors (684639).

1371681 is a wasteful number, since it uses less digits than its factorization.

1371681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613 (or 607 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 1371681 is about 1171.1878585436. The cubic root of 1371681 is about 111.1094610496.

The spelling of 1371681 in words is "one million, three hundred seventy-one thousand, six hundred eighty-one".