40013001 has 32 divisors (see below), whose sum is σ = 68321280. Its totient is φ = 22670928.

The previous prime is 40012969. The next prime is 40013023. The reversal of 40013001 is 10031004.

It is not a de Polignac number, because 40013001 - 2⁵ = 40012969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (40013041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23170 + ... + 24836.

It is an arithmetic number, because the mean of its divisors is an integer number (2135040).

Almost surely, 2^40013001 is an apocalyptic number.

It is an amenable number.

40013001 is a deficient number, since it is larger than the sum of its proper divisors (28308279).

40013001 is a wasteful number, since it uses less digits than its factorization.

40013001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810 (or 1804 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 40013001 is about 6325.5830561301. The cubic root of 40013001 is about 342.0322376506.

Adding to 40013001 its reverse (10031004), we get a palindrome (50044005).

The spelling of 40013001 in words is "forty million, thirteen thousand, one".