142545621 has 8 divisors (see below), whose sum is σ = 190173024. Its totient is φ = 94974320.

The previous prime is 142545607. The next prime is 142545631. The reversal of 142545621 is 126545241.

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 142545621 - 2⁵ = 142545589 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142545631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7686 + ... + 18551.

It is an arithmetic number, because the mean of its divisors is an integer number (23771628).

Almost surely, 2^142545621 is an apocalyptic number.

It is an amenable number.

142545621 is a deficient number, since it is larger than the sum of its proper divisors (47627403).

142545621 is a wasteful number, since it uses less digits than its factorization.

142545621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28051.

The product of its digits is 9600, while the sum is 30.

The square root of 142545621 is about 11939.2470868141. The cubic root of 142545621 is about 522.3776974646.

The spelling of 142545621 in words is "one hundred forty-two million, five hundred forty-five thousand, six hundred twenty-one".