421807542 has 16 divisors (see below), whose sum is σ = 908508720. Its totient is φ = 129786912.

The previous prime is 421807537. The next prime is 421807559. The reversal of 421807542 is 245708124.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2703817 + ... + 2703972.

It is an arithmetic number, because the mean of its divisors is an integer number (56781795).

Almost surely, 2^421807542 is an apocalyptic number.

421807542 is an abundant number, since it is smaller than the sum of its proper divisors (486701178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421807542 is a wasteful number, since it uses less digits than its factorization.

421807542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5407807.

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 421807542 is about 20537.9536955365. The cubic root of 421807542 is about 749.9600227580.

The spelling of 421807542 in words is "four hundred twenty-one million, eight hundred seven thousand, five hundred forty-two".