142120836 has 144 divisors (see below), whose sum is σ = 444575040. Its totient is φ = 37635840.

The previous prime is 142120829. The next prime is 142120871. The reversal of 142120836 is 638021241.

142120836 is a `hidden beast` number, since 1 + 421 + 208 + 36 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 97086 + ... + 98538.

Almost surely, 2^142120836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142120836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222287520).

142120836 is an abundant number, since it is smaller than the sum of its proper divisors (302454204).

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

142120836 is a wasteful number, since it uses less digits than its factorization.

142120836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506 (or 1501 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 142120836 is about 11921.4443755780. Note that the first 3 decimals coincide. The cubic root of 142120836 is about 521.8582871577.

The spelling of 142120836 in words is "one hundred forty-two million, one hundred twenty thousand, eight hundred thirty-six".