2755649 has 16 divisors (see below), whose sum is σ = 3236688. Its totient is φ = 2322432.

The previous prime is 2755637. The next prime is 2755661. The reversal of 2755649 is 9465572.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2755637) and next prime (2755661).

It can be written as a sum of positive squares in 8 ways, for example, as 10000 + 2745649 = 100^2 + 1657^2 .

It is a cyclic number.

It is not a de Polignac number, because 2755649 - 2⁴ = 2755633 is a prime.

It is a super-2 number, since 2×2755649² = 15187202822402, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2755619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8009 + ... + 8345.

It is an arithmetic number, because the mean of its divisors is an integer number (202293).

2^2755649 is an apocalyptic number.

It is an amenable number.

2755649 is a deficient number, since it is larger than the sum of its proper divisors (481039).

2755649 is a wasteful number, since it uses less digits than its factorization.

2755649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404.

The product of its digits is 75600, while the sum is 38.

The square root of 2755649 is about 1660.0147589705. The cubic root of 2755649 is about 140.1978325581.

It can be divided in two parts, 27556 and 49, that multiplied together give a square (1350244 = 1162²).

The spelling of 2755649 in words is "two million, seven hundred fifty-five thousand, six hundred forty-nine".