2520538 has 4 divisors (see below), whose sum is σ = 3780810. Its totient is φ = 1260268.

The previous prime is 2520503. The next prime is 2520577. The reversal of 2520538 is 8350252.

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

It can be written as a sum of positive squares in only one way, i.e., 2152089 + 368449 = 1467^2 + 607^2 .

It is a super-2 number, since 2×2520538² = 12706223618888, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 630133 + ... + 630136.

2^2520538 is an apocalyptic number.

2520538 is a deficient number, since it is larger than the sum of its proper divisors (1260272).

2520538 is a wasteful number, since it uses less digits than its factorization.

2520538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260271.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2520538 is about 1587.6202316675. The cubic root of 2520538 is about 136.0915257611.

The spelling of 2520538 in words is "two million, five hundred twenty thousand, five hundred thirty-eight".