2520742849 has 3 divisors (see below), whose sum is σ = 2520793057. Its totient is φ = 2520692642.

The previous prime is 2520742831. The next prime is 2520742907. The reversal of 2520742849 is 9482470252.

It is a happy number.

The square root of 2520742849 is 50207.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 2520742849 - 2¹⁵ = 2520710081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2520746849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 25104 + ... + 75310.

Almost surely, 2^2520742849 is an apocalyptic number.

2520742849 is the 50207-th square number.

2520742849 is the 25104-th centered octagonal number.

It is an amenable number.

2520742849 is a deficient number, since it is larger than the sum of its proper divisors (50208).

2520742849 is an frugal number, since it uses more digits than its factorization.

2520742849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100414 (or 50207 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The cubic root of 2520742849 is about 1360.9521246842.

The spelling of 2520742849 in words is "two billion, five hundred twenty million, seven hundred forty-two thousand, eight hundred forty-nine".