142658921 has 8 divisors (see below), whose sum is σ = 143716800. Its totient is φ = 141604848.

The previous prime is 142658899. The next prime is 142658933. The reversal of 142658921 is 129856241.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142658921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142658941) 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, 150170 + ... + 151116.

It is an arithmetic number, because the mean of its divisors is an integer number (17964600).

Almost surely, 2^142658921 is an apocalyptic number.

It is an amenable number.

142658921 is a deficient number, since it is larger than the sum of its proper divisors (1057879).

142658921 is an equidigital number, since it uses as much as digits as its factorization.

142658921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1903.

The product of its digits is 34560, while the sum is 38.

The square root of 142658921 is about 11943.9909996617. The cubic root of 142658921 is about 522.5160618675.

The spelling of 142658921 in words is "one hundred forty-two million, six hundred fifty-eight thousand, nine hundred twenty-one".