201142542 has 8 divisors (see below), whose sum is σ = 402285096. Its totient is φ = 67047512.

The previous prime is 201142541. The next prime is 201142553. The reversal of 201142542 is 245241102.

It is a sphenic number, since it is the product of 3 distinct primes.

201142542 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201142541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16761873 + ... + 16761884.

It is an arithmetic number, because the mean of its divisors is an integer number (50285637).

Almost surely, 2^201142542 is an apocalyptic number.

201142542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

201142542 is a wasteful number, since it uses less digits than its factorization.

201142542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33523762.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 201142542 is about 14182.4730565582. The cubic root of 201142542 is about 585.9150381391.

Adding to 201142542 its reverse (245241102), we get a palindrome (446383644).

The spelling of 201142542 in words is "two hundred one million, one hundred forty-two thousand, five hundred forty-two".