142136405 has 32 divisors (see below), whose sum is σ = 186416640. Its totient is φ = 103633920.

The previous prime is 142136399. The next prime is 142136417. The reversal of 142136405 is 504631241.

It is not a de Polignac number, because 142136405 - 2¹⁴ = 142120021 is a prime.

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 in 31 ways as a sum of consecutive naturals, for example, 409442 + ... + 409788.

It is an arithmetic number, because the mean of its divisors is an integer number (5825520).

Almost surely, 2^142136405 is an apocalyptic number.

It is an amenable number.

142136405 is a deficient number, since it is larger than the sum of its proper divisors (44280235).

142136405 is a wasteful number, since it uses less digits than its factorization.

142136405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 142136405 is about 11922.0973406528. The cubic root of 142136405 is about 521.8773425738.

Adding to 142136405 its reverse (504631241), we get a palindrome (646767646).

The spelling of 142136405 in words is "one hundred forty-two million, one hundred thirty-six thousand, four hundred five".