142545921 has 8 divisors (see below), whose sum is σ = 217212864. Its totient is φ = 81454800.

The previous prime is 142545899. The next prime is 142545929. The reversal of 142545921 is 129545241.

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

It is not a de Polignac number, because 142545921 - 2⁶ = 142545857 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142545929) 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, 3393930 + ... + 3393971.

It is an arithmetic number, because the mean of its divisors is an integer number (27151608).

Almost surely, 2^142545921 is an apocalyptic number.

It is an amenable number.

142545921 is a deficient number, since it is larger than the sum of its proper divisors (74666943).

142545921 is an equidigital number, since it uses as much as digits as its factorization.

142545921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6787911.

The product of its digits is 14400, while the sum is 33.

The square root of 142545921 is about 11939.2596504138. The cubic root of 142545921 is about 522.3780639278.

The spelling of 142545921 in words is "one hundred forty-two million, five hundred forty-five thousand, nine hundred twenty-one".