142399471 has 8 divisors (see below), whose sum is σ = 150852080. Its totient is φ = 134042688.

The previous prime is 142399459. The next prime is 142399501. The reversal of 142399471 is 174993241.

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 142399471 - 2⁷ = 142399343 is a prime.

It is a super-3 number, since 3×142399471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142399441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20886 + ... + 26851.

It is an arithmetic number, because the mean of its divisors is an integer number (18856510).

Almost surely, 2^142399471 is an apocalyptic number.

142399471 is a deficient number, since it is larger than the sum of its proper divisors (8452609).

142399471 is a wasteful number, since it uses less digits than its factorization.

142399471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47913.

The product of its digits is 54432, while the sum is 40.

The square root of 142399471 is about 11933.1249469701. The cubic root of 142399471 is about 522.1991076049.

The spelling of 142399471 in words is "one hundred forty-two million, three hundred ninety-nine thousand, four hundred seventy-one".