142847421 has 8 divisors (see below), whose sum is σ = 193585824. Its totient is φ = 93670320.

The previous prime is 142847389. The next prime is 142847459. The reversal of 142847421 is 124748241.

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

It is not a de Polignac number, because 142847421 - 2⁵ = 142847389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142840421) 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, 390111 + ... + 390476.

It is an arithmetic number, because the mean of its divisors is an integer number (24198228).

Almost surely, 2^142847421 is an apocalyptic number.

It is an amenable number.

142847421 is a deficient number, since it is larger than the sum of its proper divisors (50738403).

142847421 is an equidigital number, since it uses as much as digits as its factorization.

142847421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780651.

The product of its digits is 14336, while the sum is 33.

The square root of 142847421 is about 11951.8793919618. The cubic root of 142847421 is about 522.7460998899.

The spelling of 142847421 in words is "one hundred forty-two million, eight hundred forty-seven thousand, four hundred twenty-one".