2530661 has 4 divisors (see below), whose sum is σ = 2892192. Its totient is φ = 2169132.

The previous prime is 2530597. The next prime is 2530663. The reversal of 2530661 is 1660352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2530661 - 2⁶ = 2530597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2530663) 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, 180755 + ... + 180768.

It is an arithmetic number, because the mean of its divisors is an integer number (723048).

2^2530661 is an apocalyptic number.

It is an amenable number.

2530661 is a deficient number, since it is larger than the sum of its proper divisors (361531).

2530661 is an equidigital number, since it uses as much as digits as its factorization.

2530661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361530.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 2530661 is about 1590.8051420586. The cubic root of 2530661 is about 136.2734729359.

The spelling of 2530661 in words is "two million, five hundred thirty thousand, six hundred sixty-one".