142381621 has 8 divisors (see below), whose sum is σ = 144806400. Its totient is φ = 139972560.

The previous prime is 142381607. The next prime is 142381627. The reversal of 142381621 is 126183241.

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 142381621 - 2⁷ = 142381493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142381621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142381627) 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, 15111 + ... + 22651.

It is an arithmetic number, because the mean of its divisors is an integer number (18100800).

Almost surely, 2^142381621 is an apocalyptic number.

It is an amenable number.

142381621 is a deficient number, since it is larger than the sum of its proper divisors (2424779).

142381621 is an equidigital number, since it uses as much as digits as its factorization.

142381621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7859.

The product of its digits is 2304, while the sum is 28.

The square root of 142381621 is about 11932.3770054420. The cubic root of 142381621 is about 522.1772871971.

The spelling of 142381621 in words is "one hundred forty-two million, three hundred eighty-one thousand, six hundred twenty-one".