40244121 has 10 divisors (see below), whose sum is σ = 60117882. Its totient is φ = 26829360.

The previous prime is 40244081. The next prime is 40244137. The reversal of 40244121 is 12144204.

It can be written as a sum of positive squares in only one way, i.e., 40144896 + 99225 = 6336^2 + 315^2 .

It is not a de Polignac number, because 40244121 - 2¹⁷ = 40113049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40244094 and 40244103.

It is not an unprimeable number, because it can be changed into a prime (40244021) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 248340 + ... + 248501.

Almost surely, 2^40244121 is an apocalyptic number.

It is an amenable number.

40244121 is a deficient number, since it is larger than the sum of its proper divisors (19873761).

40244121 is an equidigital number, since it uses as much as digits as its factorization.

40244121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496853 (or 496844 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 40244121 is about 6343.8254231970. The cubic root of 40244121 is about 342.6895138154.

Adding to 40244121 its reverse (12144204), we get a palindrome (52388325).

The spelling of 40244121 in words is "forty million, two hundred forty-four thousand, one hundred twenty-one".