40421273 has 4 divisors (see below), whose sum is σ = 41815140. Its totient is φ = 39027408.

The previous prime is 40421267. The next prime is 40421287. The reversal of 40421273 is 37212404.

40421273 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 2 ways, for example, as 10259209 + 30162064 = 3203^2 + 5492^2 .

It is a cyclic number.

It is not a de Polignac number, because 40421273 - 2¹⁸ = 40159129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40421263) 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, 696890 + ... + 696947.

It is an arithmetic number, because the mean of its divisors is an integer number (10453785).

Almost surely, 2^40421273 is an apocalyptic number.

It is an amenable number.

40421273 is a deficient number, since it is larger than the sum of its proper divisors (1393867).

40421273 is a wasteful number, since it uses less digits than its factorization.

40421273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393866.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 40421273 is about 6357.7726445666. The cubic root of 40421273 is about 343.1916101109.

Adding to 40421273 its reverse (37212404), we get a palindrome (77633677).

The spelling of 40421273 in words is "forty million, four hundred twenty-one thousand, two hundred seventy-three".