40002505 has 8 divisors (see below), whose sum is σ = 50529600. Its totient is φ = 30317616.

The previous prime is 40002491. The next prime is 40002559. The reversal of 40002505 is 50520004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-40002505 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210445 + ... + 210634.

It is an arithmetic number, because the mean of its divisors is an integer number (6316200).

Almost surely, 2^40002505 is an apocalyptic number.

It is an amenable number.

40002505 is a deficient number, since it is larger than the sum of its proper divisors (10527095).

40002505 is a wasteful number, since it uses less digits than its factorization.

40002505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421103.

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 40002505 is about 6324.7533548748. The cubic root of 40002505 is about 342.0023283359.

Adding to 40002505 its reverse (50520004), we get a palindrome (90522509).

The spelling of 40002505 in words is "forty million, two thousand, five hundred five".