405142 has 8 divisors (see below), whose sum is σ = 611856. Its totient is φ = 201192.

The previous prime is 405091. The next prime is 405143. The reversal of 405142 is 241504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 405142.

It is not an unprimeable number, because it can be changed into a prime (405143) by changing a digit.

405142 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273 + ... + 940.

It is an arithmetic number, because the mean of its divisors is an integer number (76482).

2⁴⁰⁵¹⁴² is an apocalyptic number.

405142 is a deficient number, since it is larger than the sum of its proper divisors (206714).

405142 is a wasteful number, since it uses less digits than its factorization.

405142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 405142 is about 636.5076590270. The cubic root of 405142 is about 73.9950081853.

Adding to 405142 its reverse (241504), we get a palindrome (646646).

The spelling of 405142 in words is "four hundred five thousand, one hundred forty-two".