2562749 has 6 divisors (see below), whose sum is σ = 2981214. Its totient is φ = 2196600.

The previous prime is 2562737. The next prime is 2562751. The reversal of 2562749 is 9472652.

It can be written as a sum of positive squares in only one way, i.e., 2502724 + 60025 = 1582^2 + 245^2 .

It is not a de Polignac number, because 2562749 - 2¹⁶ = 2497213 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 5⁹ + 6³ + 2¹⁹ + 7⁵ + 4⁸ + 9³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2562719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26102 + ... + 26199.

It is an arithmetic number, because the mean of its divisors is an integer number (496869).

2^2562749 is an apocalyptic number.

It is an amenable number.

2562749 is a deficient number, since it is larger than the sum of its proper divisors (418465).

2562749 is an equidigital number, since it uses as much as digits as its factorization.

2562749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52315 (or 52308 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 2562749 is about 1600.8588320024. The cubic root of 2562749 is about 136.8470240913.

Subtracting 2562749 from its reverse (9472652), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 2562749 in words is "two million, five hundred sixty-two thousand, seven hundred forty-nine".