4040124421 has 4 divisors (see below), whose sum is σ = 4067239500. Its totient is φ = 4013009344.

The previous prime is 4040124419. The next prime is 4040124433. The reversal of 4040124421 is 1244210404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2289622500 + 1750501921 = 47850^2 + 41839^2 .

It is a cyclic number.

It is not a de Polignac number, because 4040124421 - 2¹ = 4040124419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4040124392 and 4040124401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4040124401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13557316 + ... + 13557613.

It is an arithmetic number, because the mean of its divisors is an integer number (1016809875).

Almost surely, 2^4040124421 is an apocalyptic number.

It is an amenable number.

4040124421 is a deficient number, since it is larger than the sum of its proper divisors (27115079).

4040124421 is a wasteful number, since it uses less digits than its factorization.

4040124421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27115078.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 4040124421 is about 63561.9730735288. The cubic root of 4040124421 is about 1592.6911982063.

Adding to 4040124421 its reverse (1244210404), we get a palindrome (5284334825).

The spelling of 4040124421 in words is "four billion, forty million, one hundred twenty-four thousand, four hundred twenty-one".