142278636 has 12 divisors (see below), whose sum is σ = 331983512. Its totient is φ = 47426208.

The previous prime is 142278607. The next prime is 142278637. The reversal of 142278636 is 636872241.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 142278594 and 142278603.

It is not an unprimeable number, because it can be changed into a prime (142278637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5928265 + ... + 5928288.

Almost surely, 2^142278636 is an apocalyptic number.

It is an amenable number.

142278636 is an abundant number, since it is smaller than the sum of its proper divisors (189704876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142278636 is a wasteful number, since it uses less digits than its factorization.

142278636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11856560 (or 11856558 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The square root of 142278636 is about 11928.0608650359. The cubic root of 142278636 is about 522.0513594304.

The spelling of 142278636 in words is "one hundred forty-two million, two hundred seventy-eight thousand, six hundred thirty-six".