2661573 has 4 divisors (see below), whose sum is σ = 3548768. Its totient is φ = 1774380.

The previous prime is 2661569. The next prime is 2661611. The reversal of 2661573 is 3751662.

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 2661573 - 2² = 2661569 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2661573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661553) 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, 443593 + ... + 443598.

It is an arithmetic number, because the mean of its divisors is an integer number (887192).

2^2661573 is an apocalyptic number.

It is an amenable number.

2661573 is a deficient number, since it is larger than the sum of its proper divisors (887195).

2661573 is an equidigital number, since it uses as much as digits as its factorization.

2661573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887194.

The product of its digits is 7560, while the sum is 30.

The square root of 2661573 is about 1631.4328058489. The cubic root of 2661573 is about 138.5839048127.

The spelling of 2661573 in words is "two million, six hundred sixty-one thousand, five hundred seventy-three".