40040121 has 16 divisors (see below), whose sum is σ = 58898880. Its totient is φ = 23992320.

The previous prime is 40040111. The next prime is 40040129. The reversal of 40040121 is 12104004.

It is not a de Polignac number, because 40040121 - 2¹⁵ = 40007353 is a prime.

It is a super-2 number, since 2×40040121² = 3206422579389282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40040097 and 40040106.

It is not an unprimeable number, because it can be changed into a prime (40040129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3880 + ... + 9753.

It is an arithmetic number, because the mean of its divisors is an integer number (3681180).

Almost surely, 2^40040121 is an apocalyptic number.

It is an amenable number.

40040121 is a deficient number, since it is larger than the sum of its proper divisors (18858759).

40040121 is a wasteful number, since it uses less digits than its factorization.

40040121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13736.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 40040121 is about 6327.7263689259. The cubic root of 40040121 is about 342.1094943685.

Adding to 40040121 its reverse (12104004), we get a palindrome (52144125).

The spelling of 40040121 in words is "forty million, forty thousand, one hundred twenty-one".