2520749 has 16 divisors (see below), whose sum is σ = 3310080. Its totient is φ = 1859760.

The previous prime is 2520697. The next prime is 2520769. The reversal of 2520749 is 9470252.

2520749 = 162² + 163² + ... + 227².

It is not a de Polignac number, because 2520749 - 2²⁰ = 1472173 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 5⁹ + 2¹⁵ + 0 + 7³ + 4⁵ + 9⁶ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520769) 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 15 ways as a sum of consecutive naturals, for example, 602 + ... + 2324.

It is an arithmetic number, because the mean of its divisors is an integer number (206880).

2^2520749 is an apocalyptic number.

It is an amenable number.

2520749 is a deficient number, since it is larger than the sum of its proper divisors (789331).

2520749 is a wasteful number, since it uses less digits than its factorization.

2520749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 2520749 is about 1587.6866819370. The cubic root of 2520749 is about 136.0953231661.

The spelling of 2520749 in words is "two million, five hundred twenty thousand, seven hundred forty-nine".