421255834 has 4 divisors (see below), whose sum is σ = 631883754. Its totient is φ = 210627916.

The previous prime is 421255817. The next prime is 421255837. The reversal of 421255834 is 438552124.

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., 374538609 + 46717225 = 19353^2 + 6835^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 421255834.

It is not an unprimeable number, because it can be changed into a prime (421255837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105313957 + ... + 105313960.

Almost surely, 2^421255834 is an apocalyptic number.

421255834 is a deficient number, since it is larger than the sum of its proper divisors (210627920).

421255834 is a wasteful number, since it uses less digits than its factorization.

421255834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210627919.

The product of its digits is 38400, while the sum is 34.

The square root of 421255834 is about 20524.5178749709. The cubic root of 421255834 is about 749.6329071679.

The spelling of 421255834 in words is "four hundred twenty-one million, two hundred fifty-five thousand, eight hundred thirty-four".