421668734 has 4 divisors (see below), whose sum is σ = 632503104. Its totient is φ = 210834366.

The previous prime is 421668679. The next prime is 421668763. The reversal of 421668734 is 437866124.

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

It is a junction number, because it is equal to n+sod(n) for n = 421668691 and 421668700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105417182 + ... + 105417185.

It is an arithmetic number, because the mean of its divisors is an integer number (158125776).

Almost surely, 2^421668734 is an apocalyptic number.

421668734 is a deficient number, since it is larger than the sum of its proper divisors (210834370).

421668734 is a wasteful number, since it uses less digits than its factorization.

421668734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210834369.

The product of its digits is 193536, while the sum is 41.

The square root of 421668734 is about 20534.5741129442. The cubic root of 421668734 is about 749.8777483701.

The spelling of 421668734 in words is "four hundred twenty-one million, six hundred sixty-eight thousand, seven hundred thirty-four".