40002499 has 4 divisors (see below), whose sum is σ = 40853664. Its totient is φ = 39151336.

The previous prime is 40002491. The next prime is 40002559. The reversal of 40002499 is 99420004.

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

It is a cyclic number.

It is not a de Polignac number, because 40002499 - 2³ = 40002491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40002491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425512 + ... + 425605.

It is an arithmetic number, because the mean of its divisors is an integer number (10213416).

Almost surely, 2^40002499 is an apocalyptic number.

40002499 is a deficient number, since it is larger than the sum of its proper divisors (851165).

40002499 is an equidigital number, since it uses as much as digits as its factorization.

40002499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851164.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 40002499 is about 6324.7528805480. The cubic root of 40002499 is about 342.0023112368.

The spelling of 40002499 in words is "forty million, two thousand, four hundred ninety-nine".