142213405 has 4 divisors (see below), whose sum is σ = 170656092. Its totient is φ = 113770720.

The previous prime is 142213403. The next prime is 142213411. The reversal of 142213405 is 504312241.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16818201 + 125395204 = 4101^2 + 11198^2 .

It is not a de Polignac number, because 142213405 - 2¹ = 142213403 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 (142213403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14221336 + ... + 14221345.

It is an arithmetic number, because the mean of its divisors is an integer number (42664023).

Almost surely, 2^142213405 is an apocalyptic number.

It is an amenable number.

142213405 is a deficient number, since it is larger than the sum of its proper divisors (28442687).

142213405 is an equidigital number, since it uses as much as digits as its factorization.

142213405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28442686.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 142213405 is about 11925.3262009892. The cubic root of 142213405 is about 521.9715649773.

Adding to 142213405 its reverse (504312241), we get a palindrome (646525646).

The spelling of 142213405 in words is "one hundred forty-two million, two hundred thirteen thousand, four hundred five".