142732561 has 8 divisors (see below), whose sum is σ = 154344960. Its totient is φ = 131477568.

The previous prime is 142732547. The next prime is 142732573. The reversal of 142732561 is 165237241.

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

It is a cyclic number.

It is not a de Polignac number, because 142732561 - 2¹⁵ = 142699793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142732501) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 88521 + ... + 90118.

It is an arithmetic number, because the mean of its divisors is an integer number (19293120).

Almost surely, 2^142732561 is an apocalyptic number.

It is an amenable number.

142732561 is a deficient number, since it is larger than the sum of its proper divisors (11612399).

142732561 is a wasteful number, since it uses less digits than its factorization.

142732561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178703.

The product of its digits is 10080, while the sum is 31.

The square root of 142732561 is about 11947.0733236220. The cubic root of 142732561 is about 522.6059533459.

The spelling of 142732561 in words is "one hundred forty-two million, seven hundred thirty-two thousand, five hundred sixty-one".