421642327 has 4 divisors (see below), whose sum is σ = 421730856. Its totient is φ = 421553800.

The previous prime is 421642321. The next prime is 421642363. The reversal of 421642327 is 723246124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421642327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421642321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36688 + ... + 46789.

It is an arithmetic number, because the mean of its divisors is an integer number (105432714).

Almost surely, 2^421642327 is an apocalyptic number.

421642327 is a deficient number, since it is larger than the sum of its proper divisors (88529).

421642327 is an equidigital number, since it uses as much as digits as its factorization.

421642327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88528.

The product of its digits is 16128, while the sum is 31.

The square root of 421642327 is about 20533.9311141340. The cubic root of 421642327 is about 749.8620943480.

The spelling of 421642327 in words is "four hundred twenty-one million, six hundred forty-two thousand, three hundred twenty-seven".