40124121 has 24 divisors (see below), whose sum is σ = 56644896. Its totient is φ = 25259520.

The previous prime is 40124087. The next prime is 40124129. The reversal of 40124121 is 12142104.

It is not a de Polignac number, because 40124121 - 2¹⁷ = 39993049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40124121.

It is not an unprimeable number, because it can be changed into a prime (40124129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207801 + ... + 207993.

It is an arithmetic number, because the mean of its divisors is an integer number (2360204).

Almost surely, 2^40124121 is an apocalyptic number.

It is an amenable number.

40124121 is a deficient number, since it is larger than the sum of its proper divisors (16520775).

40124121 is a wasteful number, since it uses less digits than its factorization.

40124121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373 (or 350 counting only the distinct ones).

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

The square root of 40124121 is about 6334.3603465543. The cubic root of 40124121 is about 342.3485639510.

Adding to 40124121 its reverse (12142104), we get a palindrome (52266225).

The spelling of 40124121 in words is "forty million, one hundred twenty-four thousand, one hundred twenty-one".