3640525 has 24 divisors (see below), whose sum is σ = 5249664. Its totient is φ = 2452800.

The previous prime is 3640523. The next prime is 3640537. The reversal of 3640525 is 5250463.

It is not a de Polignac number, because 3640525 - 2¹ = 3640523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 3640525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640523) 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 23 ways as a sum of consecutive naturals, for example, 12279 + ... + 12571.

It is an arithmetic number, because the mean of its divisors is an integer number (218736).

Almost surely, 2^3640525 is an apocalyptic number.

3640525 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3640525 is a deficient number, since it is larger than the sum of its proper divisors (1609139).

3640525 is a wasteful number, since it uses less digits than its factorization.

3640525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 3640525 is about 1908.0159852580. The cubic root of 3640525 is about 153.8348288138.

Adding to 3640525 its reverse (5250463), we get a palindrome (8890988).

The spelling of 3640525 in words is "three million, six hundred forty thousand, five hundred twenty-five".