40033121 has 4 divisors (see below), whose sum is σ = 41324544. Its totient is φ = 38741700.

The previous prime is 40033117. The next prime is 40033139. The reversal of 40033121 is 12133004.

40033121 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 40033121 - 2² = 40033117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40033096 and 40033105.

It is not an unprimeable number, because it can be changed into a prime (40033111) 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, 645665 + ... + 645726.

It is an arithmetic number, because the mean of its divisors is an integer number (10331136).

Almost surely, 2^40033121 is an apocalyptic number.

It is an amenable number.

40033121 is a deficient number, since it is larger than the sum of its proper divisors (1291423).

40033121 is a wasteful number, since it uses less digits than its factorization.

40033121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291422.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 40033121 is about 6327.1732234861. The cubic root of 40033121 is about 342.0895568161.

Adding to 40033121 its reverse (12133004), we get a palindrome (52166125).

The spelling of 40033121 in words is "forty million, thirty-three thousand, one hundred twenty-one".