201642045 has 32 divisors (see below), whose sum is σ = 361480320. Its totient is φ = 95120640.

The previous prime is 201642037. The next prime is 201642071. The reversal of 201642045 is 540246102.

It is not a de Polignac number, because 201642045 - 2³ = 201642037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10410 + ... + 22619.

It is an arithmetic number, because the mean of its divisors is an integer number (11296260).

Almost surely, 2^201642045 is an apocalyptic number.

It is an amenable number.

201642045 is a deficient number, since it is larger than the sum of its proper divisors (159838275).

201642045 is a wasteful number, since it uses less digits than its factorization.

201642045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33085.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 201642045 is about 14200.0720068597. The cubic root of 201642045 is about 586.3996437126.

Adding to 201642045 its reverse (540246102), we get a palindrome (741888147).

It can be divided in two parts, 201 and 642045, that added together give a palindrome (642246).

The spelling of 201642045 in words is "two hundred one million, six hundred forty-two thousand, forty-five".