2756605 has 4 divisors (see below), whose sum is σ = 3307932. Its totient is φ = 2205280.

The previous prime is 2756603. The next prime is 2756609. The reversal of 2756605 is 5066572.

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 2013561 + 743044 = 1419^2 + 862^2 .

It is not a de Polignac number, because 2756605 - 2¹ = 2756603 is a prime.

It is a super-2 number, since 2×2756605² = 15197742252050, which contains 22 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 (2756603) 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, 275656 + ... + 275665.

It is an arithmetic number, because the mean of its divisors is an integer number (826983).

2^2756605 is an apocalyptic number.

It is an amenable number.

2756605 is a deficient number, since it is larger than the sum of its proper divisors (551327).

2756605 is an equidigital number, since it uses as much as digits as its factorization.

2756605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551326.

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

The square root of 2756605 is about 1660.3026832478. The cubic root of 2756605 is about 140.2140433347.

The spelling of 2756605 in words is "two million, seven hundred fifty-six thousand, six hundred five".