405022143 has 4 divisors (see below), whose sum is σ = 540029528. Its totient is φ = 270014760.

The previous prime is 405022129. The next prime is 405022147. The reversal of 405022143 is 341220504.

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

It is a de Polignac number, because none of the positive numbers 2^k-405022143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405022147) 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, 67503688 + ... + 67503693.

It is an arithmetic number, because the mean of its divisors is an integer number (135007382).

Almost surely, 2^405022143 is an apocalyptic number.

405022143 is a deficient number, since it is larger than the sum of its proper divisors (135007385).

405022143 is a wasteful number, since it uses less digits than its factorization.

405022143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135007384.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 405022143 is about 20125.1619372367. The cubic root of 405022143 is about 739.8771058396.

Adding to 405022143 its reverse (341220504), we get a palindrome (746242647).

The spelling of 405022143 in words is "four hundred five million, twenty-two thousand, one hundred forty-three".