201142136 has 64 divisors (see below), whose sum is σ = 424569600. Its totient is φ = 88704000.

The previous prime is 201142133. The next prime is 201142141. The reversal of 201142136 is 631241102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201142133) 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 15 ways as a sum of consecutive naturals, for example, 286586 + ... + 287286.

It is an arithmetic number, because the mean of its divisors is an integer number (6633900).

Almost surely, 2^201142136 is an apocalyptic number.

201142136 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201142136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212284800).

201142136 is an abundant number, since it is smaller than the sum of its proper divisors (223427464).

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

201142136 is a wasteful number, since it uses less digits than its factorization.

201142136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840 (or 836 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 201142136 is about 14182.4587431094. The cubic root of 201142136 is about 585.9146439217.

Adding to 201142136 its reverse (631241102), we get a palindrome (832383238).

The spelling of 201142136 in words is "two hundred one million, one hundred forty-two thousand, one hundred thirty-six".