421343834 has 4 divisors (see below), whose sum is σ = 632015754. Its totient is φ = 210671916.

The previous prime is 421343833. The next prime is 421343837. The reversal of 421343834 is 438343124.

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

It can be written as a sum of positive squares in only one way, i.e., 395811025 + 25532809 = 19895^2 + 5053^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 421343834.

It is not an unprimeable number, because it can be changed into a prime (421343833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105335957 + ... + 105335960.

Almost surely, 2^421343834 is an apocalyptic number.

421343834 is a deficient number, since it is larger than the sum of its proper divisors (210671920).

421343834 is a wasteful number, since it uses less digits than its factorization.

421343834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210671919.

The product of its digits is 27648, while the sum is 32.

The square root of 421343834 is about 20526.6615405428. The cubic root of 421343834 is about 749.6851027678.

Adding to 421343834 its reverse (438343124), we get a palindrome (859686958).

The spelling of 421343834 in words is "four hundred twenty-one million, three hundred forty-three thousand, eight hundred thirty-four".