2520743 has 4 divisors (see below), whose sum is σ = 2669040. Its totient is φ = 2372448.

The previous prime is 2520697. The next prime is 2520769. The reversal of 2520743 is 3470252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2520743 - 2¹⁶ = 2455207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520443) 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 3 ways as a sum of consecutive naturals, for example, 74123 + ... + 74156.

It is an arithmetic number, because the mean of its divisors is an integer number (667260).

2^2520743 is an apocalyptic number.

2520743 is a deficient number, since it is larger than the sum of its proper divisors (148297).

2520743 is a wasteful number, since it uses less digits than its factorization.

2520743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148296.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 2520743 is about 1587.6847923943. The cubic root of 2520743 is about 136.0952151859.

Adding to 2520743 its reverse (3470252), we get a palindrome (5990995).

The spelling of 2520743 in words is "two million, five hundred twenty thousand, seven hundred forty-three".