421825143 has 4 divisors (see below), whose sum is σ = 562433528. Its totient is φ = 281216760.

The previous prime is 421825139. The next prime is 421825163. The reversal of 421825143 is 341528124.

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

It is not a de Polignac number, because 421825143 - 2² = 421825139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421825143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421825163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70304188 + ... + 70304193.

It is an arithmetic number, because the mean of its divisors is an integer number (140608382).

Almost surely, 2^421825143 is an apocalyptic number.

421825143 is a deficient number, since it is larger than the sum of its proper divisors (140608385).

421825143 is a wasteful number, since it uses less digits than its factorization.

421825143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140608384.

The product of its digits is 7680, while the sum is 30.

The square root of 421825143 is about 20538.3821904258. The cubic root of 421825143 is about 749.9704539472.

The spelling of 421825143 in words is "four hundred twenty-one million, eight hundred twenty-five thousand, one hundred forty-three".