2405897 has 4 divisors (see below), whose sum is σ = 2590980. Its totient is φ = 2220816.

The previous prime is 2405881. The next prime is 2405917. The reversal of 2405897 is 7985042.

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 1597696 + 808201 = 1264^2 + 899^2 .

It is not a de Polignac number, because 2405897 - 2⁴ = 2405881 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (2405867) 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, 92522 + ... + 92547.

It is an arithmetic number, because the mean of its divisors is an integer number (647745).

2^2405897 is an apocalyptic number.

It is an amenable number.

2405897 is a deficient number, since it is larger than the sum of its proper divisors (185083).

2405897 is a wasteful number, since it uses less digits than its factorization.

2405897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185082.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 2405897 is about 1551.0954193730. The cubic root of 2405897 is about 133.9961571631.

The spelling of 2405897 in words is "two million, four hundred five thousand, eight hundred ninety-seven".