142720136 has 64 divisors (see below), whose sum is σ = 302400000. Its totient is φ = 62689536.

The previous prime is 142720103. The next prime is 142720147. The reversal of 142720136 is 631027241.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237965 + ... + 238563.

It is an arithmetic number, because the mean of its divisors is an integer number (4725000).

Almost surely, 2^142720136 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 142720136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151200000).

142720136 is an abundant number, since it is smaller than the sum of its proper divisors (159679864).

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

142720136 is a wasteful number, since it uses less digits than its factorization.

142720136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726 (or 722 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 142720136 is about 11946.5533104741. The cubic root of 142720136 is about 522.5907884637.

Adding to 142720136 its reverse (631027241), we get a palindrome (773747377).

The spelling of 142720136 in words is "one hundred forty-two million, seven hundred twenty thousand, one hundred thirty-six".