142147481 has 12 divisors (see below), whose sum is σ = 165569040. Its totient is φ = 121683240.

The previous prime is 142147477. The next prime is 142147483. The reversal of 142147481 is 184741241.

It is not a de Polignac number, because 142147481 - 2² = 142147477 is a prime.

It is a super-2 number, since 2×142147481² = 40411812709290722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142147483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52130 + ... + 54788.

It is an arithmetic number, because the mean of its divisors is an integer number (13797420).

Almost surely, 2^142147481 is an apocalyptic number.

It is an amenable number.

142147481 is a deficient number, since it is larger than the sum of its proper divisors (23421559).

142147481 is a wasteful number, since it uses less digits than its factorization.

142147481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3764 (or 3757 counting only the distinct ones).

The product of its digits is 7168, while the sum is 32.

The square root of 142147481 is about 11922.5618471870. The cubic root of 142147481 is about 521.8908980109.

The spelling of 142147481 in words is "one hundred forty-two million, one hundred forty-seven thousand, four hundred eighty-one".