40204121 has 8 divisors (see below), whose sum is σ = 42094080. Its totient is φ = 38347792.

The previous prime is 40204103. The next prime is 40204123. The reversal of 40204121 is 12140204.

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

It is a cyclic number.

It is not a de Polignac number, because 40204121 - 2¹⁸ = 39941977 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40204096 and 40204105.

It is not an unprimeable number, because it can be changed into a prime (40204123) 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, 5945 + ... + 10758.

It is an arithmetic number, because the mean of its divisors is an integer number (5261760).

Almost surely, 2^40204121 is an apocalyptic number.

It is an amenable number.

40204121 is a deficient number, since it is larger than the sum of its proper divisors (1889959).

40204121 is a wasteful number, since it uses less digits than its factorization.

40204121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16815.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 40204121 is about 6340.6719675441. The cubic root of 40204121 is about 342.5759392593.

Adding to 40204121 its reverse (12140204), we get a palindrome (52344325).

It can be divided in two parts, 40204 and 121, that multiplied together give a palindrome (4864684).

The spelling of 40204121 in words is "forty million, two hundred four thousand, one hundred twenty-one".