142545561 has 16 divisors (see below), whose sum is σ = 206152128. Its totient is φ = 87257600.

The previous prime is 142545547. The next prime is 142545563. The reversal of 142545561 is 165545241.

142545561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 142545561 - 2¹⁰ = 142544537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142545563) 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, 31995 + ... + 36176.

It is an arithmetic number, because the mean of its divisors is an integer number (12884508).

Almost surely, 2^142545561 is an apocalyptic number.

It is an amenable number.

142545561 is a deficient number, since it is larger than the sum of its proper divisors (63606567).

142545561 is a wasteful number, since it uses less digits than its factorization.

142545561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68232.

The product of its digits is 24000, while the sum is 33.

The square root of 142545561 is about 11939.2445740926. The cubic root of 142545561 is about 522.3776241718.

It can be divided in two parts, 1425455 and 61, that added together give a triangular number (1425516 = T₁₆₈₈).

The spelling of 142545561 in words is "one hundred forty-two million, five hundred forty-five thousand, five hundred sixty-one".