40001365 has 16 divisors (see below), whose sum is σ = 51004800. Its totient is φ = 30030912.

The previous prime is 40001359. The next prime is 40001387. The reversal of 40001365 is 56310004.

It is a cyclic number.

It is not a de Polignac number, because 40001365 - 2⁹ = 40000853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

40001365 is a modest number, since divided by 1365 gives 40 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8424 + ... + 12286.

It is an arithmetic number, because the mean of its divisors is an integer number (3187800).

Almost surely, 2^40001365 is an apocalyptic number.

It is an amenable number.

40001365 is a deficient number, since it is larger than the sum of its proper divisors (11003435).

40001365 is a wasteful number, since it uses less digits than its factorization.

40001365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3996.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 40001365 is about 6324.6632321413. The cubic root of 40001365 is about 341.9990794864. Note that the first 3 decimals are identical.

Adding to 40001365 its reverse (56310004), we get a palindrome (96311369).

The spelling of 40001365 in words is "forty million, one thousand, three hundred sixty-five".