40252005 has 32 divisors (see below), whose sum is σ = 75772800. Its totient is φ = 20203776.

The previous prime is 40251989. The next prime is 40252019. The reversal of 40252005 is 50025204.

It is not a de Polignac number, because 40252005 - 2⁴ = 40251989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6475 + ... + 11064.

It is an arithmetic number, because the mean of its divisors is an integer number (2367900).

Almost surely, 2^40252005 is an apocalyptic number.

40252005 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40252005 is a deficient number, since it is larger than the sum of its proper divisors (35520795).

40252005 is a wasteful number, since it uses less digits than its factorization.

40252005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17570 (or 17564 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 40252005 is about 6344.4467843934. The cubic root of 40252005 is about 342.7118904810.

Adding to 40252005 its reverse (50025204), we get a palindrome (90277209).

The spelling of 40252005 in words is "forty million, two hundred fifty-two thousand, five".