40288121 has 8 divisors (see below), whose sum is σ = 41050944. Its totient is φ = 39528720.

The previous prime is 40288099. The next prime is 40288139. The reversal of 40288121 is 12188204.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40288121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40288021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41180 + ... + 42146.

It is an arithmetic number, because the mean of its divisors is an integer number (5131368).

Almost surely, 2^40288121 is an apocalyptic number.

It is an amenable number.

40288121 is a deficient number, since it is larger than the sum of its proper divisors (762823).

40288121 is an equidigital number, since it uses as much as digits as its factorization.

40288121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1711.

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 40288121 is about 6347.2924148805. The cubic root of 40288121 is about 342.8143589388.

The spelling of 40288121 in words is "forty million, two hundred eighty-eight thousand, one hundred twenty-one".