142421747 has 8 divisors (see below), whose sum is σ = 153477744. Its totient is φ = 131380128.

The previous prime is 142421743. The next prime is 142421761. The reversal of 142421747 is 747124241.

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 142421747 - 2² = 142421743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142421743) 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 7 ways as a sum of consecutive naturals, for example, 26153 + ... + 31125.

It is an arithmetic number, because the mean of its divisors is an integer number (19184718).

Almost surely, 2^142421747 is an apocalyptic number.

142421747 is a deficient number, since it is larger than the sum of its proper divisors (11055997).

142421747 is a wasteful number, since it uses less digits than its factorization.

142421747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7189.

The product of its digits is 12544, while the sum is 32.

The square root of 142421747 is about 11934.0582787248. The cubic root of 142421747 is about 522.2263359383.

Adding to 142421747 its reverse (747124241), we get a palindrome (889545988).

The spelling of 142421747 in words is "one hundred forty-two million, four hundred twenty-one thousand, seven hundred forty-seven".