142476721 has 8 divisors (see below), whose sum is σ = 144496800. Its totient is φ = 140464032.

The previous prime is 142476709. The next prime is 142476727. The reversal of 142476721 is 127674241.

It is a happy number.

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 142476721 - 2¹⁷ = 142345649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142476727) 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, 45205 + ... + 48253.

It is an arithmetic number, because the mean of its divisors is an integer number (18062100).

Almost surely, 2^142476721 is an apocalyptic number.

It is an amenable number.

142476721 is a deficient number, since it is larger than the sum of its proper divisors (2020079).

142476721 is an equidigital number, since it uses as much as digits as its factorization.

142476721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3695.

The product of its digits is 18816, while the sum is 34.

The square root of 142476721 is about 11936.3612964756. The cubic root of 142476721 is about 522.2935194459.

The spelling of 142476721 in words is "one hundred forty-two million, four hundred seventy-six thousand, seven hundred twenty-one".