2640525 has 48 divisors (see below), whose sum is σ = 4910400. Its totient is φ = 1244160.

The previous prime is 2640511. The next prime is 2640527. The reversal of 2640525 is 5250462.

It is not a de Polignac number, because 2640525 - 2⁴ = 2640509 is a prime.

2640525 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2640495 and 2640504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24171 + ... + 24279.

It is an arithmetic number, because the mean of its divisors is an integer number (102300).

2^2640525 is an apocalyptic number.

2640525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2640525 is a deficient number, since it is larger than the sum of its proper divisors (2269875).

2640525 is a wasteful number, since it uses less digits than its factorization.

2640525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 2640525 is about 1624.9692304779. The cubic root of 2640525 is about 138.2176255389.

Adding to 2640525 its reverse (5250462), we get a palindrome (7890987).

The spelling of 2640525 in words is "two million, six hundred forty thousand, five hundred twenty-five".