2545905 has 16 divisors (see below), whose sum is σ = 4288320. Its totient is φ = 1286208.

The previous prime is 2545891. The next prime is 2545919. The reversal of 2545905 is 5095452.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2545891) and next prime (2545919).

It is not a de Polignac number, because 2545905 - 2⁴ = 2545889 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4182 + ... + 4751.

It is an arithmetic number, because the mean of its divisors is an integer number (268020).

2^2545905 is an apocalyptic number.

It is an amenable number.

2545905 is a deficient number, since it is larger than the sum of its proper divisors (1742415).

2545905 is a wasteful number, since it uses less digits than its factorization.

2545905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8960.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 2545905 is about 1595.5892328541. The cubic root of 2545905 is about 136.5465498899.

The spelling of 2545905 in words is "two million, five hundred forty-five thousand, nine hundred five".