421903942 has 8 divisors (see below), whose sum is σ = 634318776. Its totient is φ = 210464352.

The previous prime is 421903931. The next prime is 421903961. The reversal of 421903942 is 249309124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 421903898 and 421903907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242728 + ... + 244459.

It is an arithmetic number, because the mean of its divisors is an integer number (79289847).

Almost surely, 2^421903942 is an apocalyptic number.

421903942 is a deficient number, since it is larger than the sum of its proper divisors (212414834).

421903942 is a wasteful number, since it uses less digits than its factorization.

421903942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487622.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 421903942 is about 20540.3004359722. The cubic root of 421903942 is about 750.0171504226.

The spelling of 421903942 in words is "four hundred twenty-one million, nine hundred three thousand, nine hundred forty-two".