40056121 has 4 divisors (see below), whose sum is σ = 45778432. Its totient is φ = 34333812.

The previous prime is 40056073. The next prime is 40056167. The reversal of 40056121 is 12165004.

40056121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40056121 - 2¹³ = 40047929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40056421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2861145 + ... + 2861158.

It is an arithmetic number, because the mean of its divisors is an integer number (11444608).

Almost surely, 2^40056121 is an apocalyptic number.

It is an amenable number.

40056121 is a deficient number, since it is larger than the sum of its proper divisors (5722311).

40056121 is an equidigital number, since it uses as much as digits as its factorization.

40056121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5722310.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 40056121 is about 6328.9905198223. The cubic root of 40056121 is about 342.1550571926.

The spelling of 40056121 in words is "forty million, fifty-six thousand, one hundred twenty-one".