142635561 has 16 divisors (see below), whose sum is σ = 194322240. Its totient is φ = 93030080.

The previous prime is 142635541. The next prime is 142635569. The reversal of 142635561 is 165536241.

It is a cyclic number.

It is not a de Polignac number, because 142635561 - 2⁶ = 142635497 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142635569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65551 + ... + 67691.

It is an arithmetic number, because the mean of its divisors is an integer number (12145140).

Almost surely, 2^142635561 is an apocalyptic number.

It is an amenable number.

142635561 is a deficient number, since it is larger than the sum of its proper divisors (51686679).

142635561 is a wasteful number, since it uses less digits than its factorization.

142635561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616.

The product of its digits is 21600, while the sum is 33.

The square root of 142635561 is about 11943.0130620376. The cubic root of 142635561 is about 522.4875401285.

The spelling of 142635561 in words is "one hundred forty-two million, six hundred thirty-five thousand, five hundred sixty-one".