2420881 has 4 divisors (see below), whose sum is σ = 2466612. Its totient is φ = 2375152.

The previous prime is 2420879. The next prime is 2420897. The reversal of 2420881 is 1880242.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1985281 + 435600 = 1409^2 + 660^2 .

It is a cyclic number.

It is not a de Polignac number, because 2420881 - 2¹ = 2420879 is a prime.

It is a super-2 number, since 2×2420881² = 11721329632322, which contains 22 as substring.

It is a Duffinian number.

2420881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2420801) 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, 22786 + ... + 22891.

It is an arithmetic number, because the mean of its divisors is an integer number (616653).

2^2420881 is an apocalyptic number.

It is an amenable number.

2420881 is a deficient number, since it is larger than the sum of its proper divisors (45731).

2420881 is an equidigital number, since it uses as much as digits as its factorization.

2420881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45730.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 2420881 is about 1555.9180569683. The cubic root of 2420881 is about 134.2737590404.

The spelling of 2420881 in words is "two million, four hundred twenty thousand, eight hundred eighty-one".