4205957421 has 8 divisors (see below), whose sum is σ = 5609183104. Its totient is φ = 2803351680.

The previous prime is 4205957417. The next prime is 4205957449. The reversal of 4205957421 is 1247595024.

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

It is not a de Polignac number, because 4205957421 - 2² = 4205957417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4205957421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4205957221) 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, 138916 + ... + 166461.

It is an arithmetic number, because the mean of its divisors is an integer number (701147888).

Almost surely, 2^4205957421 is an apocalyptic number.

It is an amenable number.

4205957421 is a deficient number, since it is larger than the sum of its proper divisors (1403225683).

4205957421 is a wasteful number, since it uses less digits than its factorization.

4205957421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309971.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 4205957421 is about 64853.3531978108. The cubic root of 4205957421 is about 1614.1911327447.

The spelling of 4205957421 in words is "four billion, two hundred five million, nine hundred fifty-seven thousand, four hundred twenty-one".