2405206421 has 8 divisors (see below), whose sum is σ = 2421918144. Its totient is φ = 2388548800.

The previous prime is 2405206403. The next prime is 2405206451. The reversal of 2405206421 is 1246025042.

2405206421 is digitally balanced in base 2, 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 2405206421 - 2⁶ = 2405206357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2405206451) 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, 77816 + ... + 104238.

It is an arithmetic number, because the mean of its divisors is an integer number (302739768).

Almost surely, 2^2405206421 is an apocalyptic number.

It is an amenable number.

2405206421 is a deficient number, since it is larger than the sum of its proper divisors (16711723).

2405206421 is a wasteful number, since it uses less digits than its factorization.

2405206421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27051.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 2405206421 is about 49042.9038801741. The cubic root of 2405206421 is about 1339.8333536358.

The spelling of 2405206421 in words is "two billion, four hundred five million, two hundred six thousand, four hundred twenty-one".