2149881 has 8 divisors (see below), whose sum is σ = 2959104. Its totient is φ = 1386960.

The previous prime is 2149877. The next prime is 2149883. The reversal of 2149881 is 1889412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2149881 - 2² = 2149877 is a prime.

It is a super-2 number, since 2×2149881² = 9243976628322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2149883) 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, 11466 + ... + 11651.

It is an arithmetic number, because the mean of its divisors is an integer number (369888).

2^2149881 is an apocalyptic number.

It is an amenable number.

2149881 is a deficient number, since it is larger than the sum of its proper divisors (809223).

2149881 is a wasteful number, since it uses less digits than its factorization.

2149881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23151.

The product of its digits is 4608, while the sum is 33.

The square root of 2149881 is about 1466.2472506368. The cubic root of 2149881 is about 129.0639068005.

The spelling of 2149881 in words is "two million, one hundred forty-nine thousand, eight hundred eighty-one".