2420905 has 4 divisors (see below), whose sum is σ = 2905092. Its totient is φ = 1936720.

The previous prime is 2420897. The next prime is 2420917. The reversal of 2420905 is 5090242.

It is a happy number.

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 1838736 + 582169 = 1356^2 + 763^2 .

It is not a de Polignac number, because 2420905 - 2³ = 2420897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242086 + ... + 242095.

It is an arithmetic number, because the mean of its divisors is an integer number (726273).

2^2420905 is an apocalyptic number.

It is an amenable number.

2420905 is a deficient number, since it is larger than the sum of its proper divisors (484187).

2420905 is an equidigital number, since it uses as much as digits as its factorization.

2420905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484186.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2420905 is about 1555.9257694376. The cubic root of 2420905 is about 134.2742027576.

The spelling of 2420905 in words is "two million, four hundred twenty thousand, nine hundred five".