4000252421 has 8 divisors (see below), whose sum is σ = 4364791488. Its totient is φ = 3635860000.

The previous prime is 4000252411. The next prime is 4000252423. The reversal of 4000252421 is 1242520004.

It is a happy number.

4000252421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4000252421 - 2¹⁰ = 4000251397 is a prime.

It is a super-2 number, since 2×4000252421² = 32004038863432722482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4000252393 and 4000252402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000252423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24881 + ... + 92841.

It is an arithmetic number, because the mean of its divisors is an integer number (545598936).

Almost surely, 2^4000252421 is an apocalyptic number.

It is an amenable number.

4000252421 is a deficient number, since it is larger than the sum of its proper divisors (364539067).

4000252421 is a wasteful number, since it uses less digits than its factorization.

4000252421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73323.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 4000252421 is about 63247.5487351091. The cubic root of 4000252421 is about 1587.4344423793.

Adding to 4000252421 its reverse (1242520004), we get a palindrome (5242772425).

The spelling of 4000252421 in words is "four billion, two hundred fifty-two thousand, four hundred twenty-one".