142725621 has 8 divisors (see below), whose sum is σ = 190386144. Its totient is φ = 95107760.

The previous prime is 142725619. The next prime is 142725647. The reversal of 142725621 is 126527241.

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 142725621 - 2¹ = 142725619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142723621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1806 + ... + 16991.

It is an arithmetic number, because the mean of its divisors is an integer number (23798268).

Almost surely, 2^142725621 is an apocalyptic number.

It is an amenable number.

142725621 is a deficient number, since it is larger than the sum of its proper divisors (47660523).

142725621 is a wasteful number, since it uses less digits than its factorization.

142725621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21331.

The product of its digits is 6720, while the sum is 30.

The square root of 142725621 is about 11946.7828723887. The cubic root of 142725621 is about 522.5974830896.

The spelling of 142725621 in words is "one hundred forty-two million, seven hundred twenty-five thousand, six hundred twenty-one".