40121233 has 4 divisors (see below), whose sum is σ = 40147380. Its totient is φ = 40095088.

The previous prime is 40121231. The next prime is 40121243. The reversal of 40121233 is 33212104.

It is a happy number.

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 17918289 + 22202944 = 4233^2 + 4712^2 .

It is a cyclic number.

It is not a de Polignac number, because 40121233 - 2¹ = 40121231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40121231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10618 + ... + 13891.

It is an arithmetic number, because the mean of its divisors is an integer number (10036845).

Almost surely, 2^40121233 is an apocalyptic number.

It is an amenable number.

40121233 is a deficient number, since it is larger than the sum of its proper divisors (26147).

40121233 is a wasteful number, since it uses less digits than its factorization.

40121233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26146.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 40121233 is about 6334.1323794187. The cubic root of 40121233 is about 342.3403500525.

Adding to 40121233 its reverse (33212104), we get a palindrome (73333337).

The spelling of 40121233 in words is "forty million, one hundred twenty-one thousand, two hundred thirty-three".