40716121 has 4 divisors (see below), whose sum is σ = 40741812. Its totient is φ = 40690432.

The previous prime is 40716119. The next prime is 40716127. The reversal of 40716121 is 12161704.

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 17338896 + 23377225 = 4164^2 + 4835^2 .

It is a cyclic number.

It is not a de Polignac number, because 40716121 - 2¹ = 40716119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40716092 and 40716101.

It is not an unprimeable number, because it can be changed into a prime (40716127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10300 + ... + 13693.

It is an arithmetic number, because the mean of its divisors is an integer number (10185453).

Almost surely, 2^40716121 is an apocalyptic number.

It is an amenable number.

40716121 is a deficient number, since it is larger than the sum of its proper divisors (25691).

40716121 is a wasteful number, since it uses less digits than its factorization.

40716121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25690.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 40716121 is about 6380.9185075505. The cubic root of 40716121 is about 344.0240456646.

Adding to 40716121 its reverse (12161704), we get a palindrome (52877825).

The spelling of 40716121 in words is "forty million, seven hundred sixteen thousand, one hundred twenty-one".