40009525 has 12 divisors (see below), whose sum is σ = 49701184. Its totient is φ = 31950000.

The previous prime is 40009523. The next prime is 40009553. The reversal of 40009525 is 52590004.

It is not a de Polignac number, because 40009525 - 2¹ = 40009523 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40009525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40009523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17710 + ... + 19840.

Almost surely, 2^40009525 is an apocalyptic number.

It is an amenable number.

40009525 is a deficient number, since it is larger than the sum of its proper divisors (9691659).

40009525 is a wasteful number, since it uses less digits than its factorization.

40009525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2892 (or 2887 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 40009525 is about 6325.3082928819. The cubic root of 40009525 is about 342.0223330491.

Adding to 40009525 its reverse (52590004), we get a palindrome (92599529).

The spelling of 40009525 in words is "forty million, nine thousand, five hundred twenty-five".