2606557 has 4 divisors (see below), whose sum is σ = 2613340. Its totient is φ = 2599776.

The previous prime is 2606551. The next prime is 2606579. The reversal of 2606557 is 7556062.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2277081 + 329476 = 1509^2 + 574^2 .

It is a cyclic number.

It is not a de Polignac number, because 2606557 - 2¹¹ = 2604509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2606551) 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, 2778 + ... + 3595.

It is an arithmetic number, because the mean of its divisors is an integer number (653335).

2^2606557 is an apocalyptic number.

It is an amenable number.

2606557 is a deficient number, since it is larger than the sum of its proper divisors (6783).

2606557 is an equidigital number, since it uses as much as digits as its factorization.

2606557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6782.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 2606557 is about 1614.4835087420. The cubic root of 2606557 is about 137.6223836006.

The spelling of 2606557 in words is "two million, six hundred six thousand, five hundred fifty-seven".