201242534 has 4 divisors (see below), whose sum is σ = 301863804. Its totient is φ = 100621266.

The previous prime is 201242527. The next prime is 201242539. The reversal of 201242534 is 435242102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 435242102 = 2 ⋅217621051.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201242539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50310632 + ... + 50310635.

It is an arithmetic number, because the mean of its divisors is an integer number (75465951).

Almost surely, 2^201242534 is an apocalyptic number.

201242534 is a deficient number, since it is larger than the sum of its proper divisors (100621270).

201242534 is a wasteful number, since it uses less digits than its factorization.

201242534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100621269.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 201242534 is about 14185.9978147468. The cubic root of 201242534 is about 586.0121121020.

Adding to 201242534 its reverse (435242102), we get a palindrome (636484636).

The spelling of 201242534 in words is "two hundred one million, two hundred forty-two thousand, five hundred thirty-four".