142420247 has 4 divisors (see below), whose sum is σ = 147331320. Its totient is φ = 137509176.

The previous prime is 142420193. The next prime is 142420253. The reversal of 142420247 is 742024241.

142420247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142420247 - 2¹⁰ = 142419223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142420547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2455493 + ... + 2455550.

It is an arithmetic number, because the mean of its divisors is an integer number (36832830).

Almost surely, 2^142420247 is an apocalyptic number.

142420247 is a deficient number, since it is larger than the sum of its proper divisors (4911073).

142420247 is an equidigital number, since it uses as much as digits as its factorization.

142420247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4911072.

The product of its (nonzero) digits is 3584, while the sum is 26.

The square root of 142420247 is about 11933.9954332151. The cubic root of 142420247 is about 522.2245025520.

Adding to 142420247 its reverse (742024241), we get a palindrome (884444488).

The spelling of 142420247 in words is "one hundred forty-two million, four hundred twenty thousand, two hundred forty-seven".