40403121 has 8 divisors (see below), whose sum is σ = 58768224. Its totient is φ = 24486720.

The previous prime is 40403113. The next prime is 40403123. The reversal of 40403121 is 12130404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40403121 - 2³ = 40403113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40403121.

It is not an unprimeable number, because it can be changed into a prime (40403123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 612136 + ... + 612201.

It is an arithmetic number, because the mean of its divisors is an integer number (7346028).

Almost surely, 2^40403121 is an apocalyptic number.

It is an amenable number.

40403121 is a deficient number, since it is larger than the sum of its proper divisors (18365103).

40403121 is a wasteful number, since it uses less digits than its factorization.

40403121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224351.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 40403121 is about 6356.3449402939. The cubic root of 40403121 is about 343.1402300133.

Adding to 40403121 its reverse (12130404), we get a palindrome (52533525).

The spelling of 40403121 in words is "forty million, four hundred three thousand, one hundred twenty-one".