40005240421 has 16 divisors (see below), whose sum is σ = 42196412160. Its totient is φ = 37869249600.

The previous prime is 40005240413. The next prime is 40005240427. The reversal of 40005240421 is 12404250004.

It is a happy number.

40005240421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 40005240421 - 2³ = 40005240413 is a prime.

It is a super-2 number, since 2×40005240421² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40005240392 and 40005240401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40005240427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2270596 + ... + 2288146.

It is an arithmetic number, because the mean of its divisors is an integer number (2637275760).

Almost surely, 2^40005240421 is an apocalyptic number.

It is an amenable number.

40005240421 is a deficient number, since it is larger than the sum of its proper divisors (2191171739).

40005240421 is a wasteful number, since it uses less digits than its factorization.

40005240421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19116.

The product of its (nonzero) digits is 1280, while the sum is 22.

Adding to 40005240421 its reverse (12404250004), we get a palindrome (52409490425).

The spelling of 40005240421 in words is "forty billion, five million, two hundred forty thousand, four hundred twenty-one".