2125881 has 6 divisors (see below), whose sum is σ = 3070730. Its totient is φ = 1417248.

The previous prime is 2125873. The next prime is 2125889. The reversal of 2125881 is 1885212.

It is an interprime number because it is at equal distance from previous prime (2125873) and next prime (2125889).

It can be written as a sum of positive squares in only one way, i.e., 1299600 + 826281 = 1140^2 + 909^2 .

It is not a de Polignac number, because 2125881 - 2³ = 2125873 is a prime.

It is a super-2 number, since 2×2125881² = 9038740052322, which contains 22 as substring.

It is a Duffinian number.

2125881 is a lucky number.

It is a plaindrome in base 11.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (2125889) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118096 + ... + 118113.

2^2125881 is an apocalyptic number.

It is an amenable number.

2125881 is a deficient number, since it is larger than the sum of its proper divisors (944849).

2125881 is a wasteful number, since it uses less digits than its factorization.

2125881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236215 (or 236212 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 2125881 is about 1458.0401229047. The cubic root of 2125881 is about 128.5818441298.

The spelling of 2125881 in words is "two million, one hundred twenty-five thousand, eight hundred eighty-one".