421840827 has 6 divisors (see below), whose sum is σ = 609325652. Its totient is φ = 281227212.

The previous prime is 421840823. The next prime is 421840843. The reversal of 421840827 is 728048124.

It is not a de Polignac number, because 421840827 - 2² = 421840823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421840791 and 421840800.

It is not an unprimeable number, because it can be changed into a prime (421840823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23435593 + ... + 23435610.

Almost surely, 2^421840827 is an apocalyptic number.

421840827 is a deficient number, since it is larger than the sum of its proper divisors (187484825).

421840827 is a wasteful number, since it uses less digits than its factorization.

421840827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46871209 (or 46871206 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 421840827 is about 20538.7640085766. The cubic root of 421840827 is about 749.9797487865.

The spelling of 421840827 in words is "four hundred twenty-one million, eight hundred forty thousand, eight hundred twenty-seven".