40421121 has 32 divisors (see below), whose sum is σ = 62995968. Its totient is φ = 22824960.

The previous prime is 40421093. The next prime is 40421123. The reversal of 40421121 is 12112404.

It is not a de Polignac number, because 40421121 - 2⁵ = 40421089 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40421121.

It is not an unprimeable number, because it can be changed into a prime (40421123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26440 + ... + 27926.

It is an arithmetic number, because the mean of its divisors is an integer number (1968624).

Almost surely, 2^40421121 is an apocalyptic number.

40421121 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

40421121 is a deficient number, since it is larger than the sum of its proper divisors (22574847).

40421121 is a wasteful number, since it uses less digits than its factorization.

40421121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 40421121 is about 6357.7606906835. The cubic root of 40421121 is about 343.1911799316.

Adding to 40421121 its reverse (12112404), we get a palindrome (52533525).

The spelling of 40421121 in words is "forty million, four hundred twenty-one thousand, one hundred twenty-one".