40121306 has 4 divisors (see below), whose sum is σ = 60181962. Its totient is φ = 20060652.

The previous prime is 40121303. The next prime is 40121317. The reversal of 40121306 is 60312104.

40121306 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.

It can be written as a sum of positive squares in only one way, i.e., 37027225 + 3094081 = 6085^2 + 1759^2 .

It is not an unprimeable number, because it can be changed into a prime (40121303) 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 as a sum of consecutive naturals, namely, 10030325 + ... + 10030328.

Almost surely, 2^40121306 is an apocalyptic number.

40121306 is a deficient number, since it is larger than the sum of its proper divisors (20060656).

40121306 is a wasteful number, since it uses less digits than its factorization.

40121306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20060655.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 40121306 is about 6334.1381418469. The cubic root of 40121306 is about 342.3405576801.

The spelling of 40121306 in words is "forty million, one hundred twenty-one thousand, three hundred six".