142928821 has 8 divisors (see below), whose sum is σ = 165032000. Its totient is φ = 121246848.

The previous prime is 142928813. The next prime is 142928827. The reversal of 142928821 is 128829241.

It is a happy number.

142928821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 142928821 - 2³ = 142928813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142928827) 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, 104571 + ... + 105928.

It is an arithmetic number, because the mean of its divisors is an integer number (20629000).

Almost surely, 2^142928821 is an apocalyptic number.

It is an amenable number.

142928821 is a deficient number, since it is larger than the sum of its proper divisors (22103179).

142928821 is an equidigital number, since it uses as much as digits as its factorization.

142928821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210603.

The product of its digits is 18432, while the sum is 37.

The square root of 142928821 is about 11955.2842291599. The cubic root of 142928821 is about 522.8453747019.

The spelling of 142928821 in words is "one hundred forty-two million, nine hundred twenty-eight thousand, eight hundred twenty-one".