4492171421 has 2 divisors, whose sum is σ = 4492171422. Its totient is φ = 4492171420.

The previous prime is 4492171417. The next prime is 4492171451. The reversal of 4492171421 is 1241712944.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3795792100 + 696379321 = 61610^2 + 26389^2 .

It is a cyclic number.

It is not a de Polignac number, because 4492171421 - 2² = 4492171417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4492171451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2246085710 + 2246085711.

It is an arithmetic number, because the mean of its divisors is an integer number (2246085711).

Almost surely, 2^4492171421 is an apocalyptic number.

It is an amenable number.

4492171421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4492171421 is an equidigital number, since it uses as much as digits as its factorization.

4492171421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The square root of 4492171421 is about 67023.6631422067. The cubic root of 4492171421 is about 1650.0056836045.

The spelling of 4492171421 in words is "four billion, four hundred ninety-two million, one hundred seventy-one thousand, four hundred twenty-one".