2545581 has 8 divisors (see below), whose sum is σ = 3415104. Its totient is φ = 1686560.

The previous prime is 2545573. The next prime is 2545603. The reversal of 2545581 is 1855452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2545581 - 2³ = 2545573 is a prime.

It is a super-2 number, since 2×2545581² = 12959965255122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2040 + ... + 3041.

It is an arithmetic number, because the mean of its divisors is an integer number (426888).

2^2545581 is an apocalyptic number.

It is an amenable number.

2545581 is a deficient number, since it is larger than the sum of its proper divisors (869523).

2545581 is a wasteful number, since it uses less digits than its factorization.

2545581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5251.

The product of its digits is 8000, while the sum is 30.

The square root of 2545581 is about 1595.4876997332. The cubic root of 2545581 is about 136.5407571941.

The spelling of 2545581 in words is "two million, five hundred forty-five thousand, five hundred eighty-one".