201042542 has 4 divisors (see below), whose sum is σ = 301563816. Its totient is φ = 100521270.

The previous prime is 201042539. The next prime is 201042551. The reversal of 201042542 is 245240102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 50260634 + ... + 50260637.

It is an arithmetic number, because the mean of its divisors is an integer number (75390954).

Almost surely, 2^201042542 is an apocalyptic number.

201042542 is a deficient number, since it is larger than the sum of its proper divisors (100521274).

201042542 is a wasteful number, since it uses less digits than its factorization.

201042542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100521273.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 201042542 is about 14178.9471400383. The cubic root of 201042542 is about 585.8179242289.

Adding to 201042542 its reverse (245240102), we get a palindrome (446282644).

The spelling of 201042542 in words is "two hundred one million, forty-two thousand, five hundred forty-two".