405444142 has 4 divisors (see below), whose sum is σ = 608166216. Its totient is φ = 202722070.

The previous prime is 405444107. The next prime is 405444167. The reversal of 405444142 is 241444504.

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

It is a self number, because there is not a number n which added to its sum of digits gives 405444142.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101361034 + ... + 101361037.

It is an arithmetic number, because the mean of its divisors is an integer number (152041554).

Almost surely, 2^405444142 is an apocalyptic number.

405444142 is a deficient number, since it is larger than the sum of its proper divisors (202722074).

405444142 is a wasteful number, since it uses less digits than its factorization.

405444142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202722073.

The product of its (nonzero) digits is 10240, while the sum is 28.

The square root of 405444142 is about 20135.6435705443. The cubic root of 405444142 is about 740.1339798802.

Adding to 405444142 its reverse (241444504), we get a palindrome (646888646).

The spelling of 405444142 in words is "four hundred five million, four hundred forty-four thousand, one hundred forty-two".