881381 has 4 divisors (see below), whose sum is σ = 883500. Its totient is φ = 879264.

The previous prime is 881369. The next prime is 881393. The reversal of 881381 is 183188.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (881369) and next prime (881393).

It can be written as a sum of positive squares in 2 ways, for example, as 217156 + 664225 = 466^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 881381 - 2⁶ = 881317 is a prime.

It is a super-2 number, since 2×881381² = 1553664934322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (881311) 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, 206 + ... + 1343.

It is an arithmetic number, because the mean of its divisors is an integer number (220875).

2⁸⁸¹³⁸¹ is an apocalyptic number.

It is an amenable number.

881381 is a deficient number, since it is larger than the sum of its proper divisors (2119).

881381 is a wasteful number, since it uses less digits than its factorization.

881381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118.

The product of its digits is 1536, while the sum is 29.

The square root of 881381 is about 938.8189388801. The cubic root of 881381 is about 95.8784993569.

The spelling of 881381 in words is "eight hundred eighty-one thousand, three hundred eighty-one".