371881 has 4 divisors (see below), whose sum is σ = 373252. Its totient is φ = 370512.

The previous prime is 371873. The next prime is 371897. The reversal of 371881 is 188173.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 188173 = 17 ⋅11069.

It can be written as a sum of positive squares in 2 ways, for example, as 266256 + 105625 = 516^2 + 325^2 .

It is a cyclic number.

It is not a de Polignac number, because 371881 - 2³ = 371873 is a prime.

It is a super-2 number, since 2×371881² = 276590956322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (371831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126 + ... + 871.

It is an arithmetic number, because the mean of its divisors is an integer number (93313).

2³⁷¹⁸⁸¹ is an apocalyptic number.

It is an amenable number.

371881 is a deficient number, since it is larger than the sum of its proper divisors (1371).

371881 is an equidigital number, since it uses as much as digits as its factorization.

371881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370.

The product of its digits is 1344, while the sum is 28.

The square root of 371881 is about 609.8204653831. The cubic root of 371881 is about 71.9119938106.

The spelling of 371881 in words is "three hundred seventy-one thousand, eight hundred eighty-one".