2658749 has 8 divisors (see below), whose sum is σ = 2912760. Its totient is φ = 2415616.

The previous prime is 2658707. The next prime is 2658751. The reversal of 2658749 is 9478562.

2658749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1464100 + 1194649 = 1210^2 + 1093^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2658749 - 2¹² = 2654653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2658769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2204 + ... + 3189.

It is an arithmetic number, because the mean of its divisors is an integer number (364095).

2^2658749 is an apocalyptic number.

2658749 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2658749 is a deficient number, since it is larger than the sum of its proper divisors (254011).

2658749 is a wasteful number, since it uses less digits than its factorization.

2658749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5439.

The product of its digits is 120960, while the sum is 41.

The square root of 2658749 is about 1630.5670792703. The cubic root of 2658749 is about 138.5348737268.

The spelling of 2658749 in words is "two million, six hundred fifty-eight thousand, seven hundred forty-nine".