2545903 has 4 divisors (see below), whose sum is σ = 2695680. Its totient is φ = 2396128.

The previous prime is 2545891. The next prime is 2545919. The reversal of 2545903 is 3095452.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2545903 is a prime.

It is a super-3 number, since 3×2545903³ = 49504743336327087981, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545973) 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, 74863 + ... + 74896.

It is an arithmetic number, because the mean of its divisors is an integer number (673920).

2^2545903 is an apocalyptic number.

2545903 is a deficient number, since it is larger than the sum of its proper divisors (149777).

2545903 is a wasteful number, since it uses less digits than its factorization.

2545903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149776.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 2545903 is about 1595.5886061263. The cubic root of 2545903 is about 136.5465141340.

The spelling of 2545903 in words is "two million, five hundred forty-five thousand, nine hundred three".