421642023 has 16 divisors (see below), whose sum is σ = 617780736. Its totient is φ = 253672640.

The previous prime is 421642021. The next prime is 421642037. The reversal of 421642023 is 320246124.

It is a cyclic number.

It is not a de Polignac number, because 421642023 - 2¹ = 421642021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421641984 and 421642002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421642021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42111 + ... + 51152.

It is an arithmetic number, because the mean of its divisors is an integer number (38611296).

Almost surely, 2^421642023 is an apocalyptic number.

421642023 is a deficient number, since it is larger than the sum of its proper divisors (196138713).

421642023 is a wasteful number, since it uses less digits than its factorization.

421642023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93414.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 421642023 is about 20533.9237117508. The cubic root of 421642023 is about 749.8619141335.

Adding to 421642023 its reverse (320246124), we get a palindrome (741888147).

The spelling of 421642023 in words is "four hundred twenty-one million, six hundred forty-two thousand, twenty-three".