2409881 has 4 divisors (see below), whose sum is σ = 2432100. Its totient is φ = 2387664.

The previous prime is 2409863. The next prime is 2409893. The reversal of 2409881 is 1889042.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1889042 = 2 ⋅944521.

It can be written as a sum of positive squares in 2 ways, for example, as 931225 + 1478656 = 965^2 + 1216^2 .

It is a cyclic number.

It is not a de Polignac number, because 2409881 - 2⁶ = 2409817 is a prime.

It is a super-2 number, since 2×2409881² = 11615052868322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2403881) 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, 10946 + ... + 11163.

It is an arithmetic number, because the mean of its divisors is an integer number (608025).

2^2409881 is an apocalyptic number.

It is an amenable number.

2409881 is a deficient number, since it is larger than the sum of its proper divisors (22219).

2409881 is a wasteful number, since it uses less digits than its factorization.

2409881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22218.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 2409881 is about 1552.3791418336. The cubic root of 2409881 is about 134.0700791824.

The spelling of 2409881 in words is "two million, four hundred nine thousand, eight hundred eighty-one".