142727231 has 4 divisors (see below), whose sum is σ = 143104200. Its totient is φ = 142350264.

The previous prime is 142727197. The next prime is 142727243. The reversal of 142727231 is 132727241.

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 142727231 - 2¹⁸ = 142465087 is a prime.

It is a super-2 number, since 2×142727231² = 40742124937854722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142727194 and 142727203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142727831) 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 3 ways as a sum of consecutive naturals, for example, 187916 + ... + 188673.

It is an arithmetic number, because the mean of its divisors is an integer number (35776050).

Almost surely, 2^142727231 is an apocalyptic number.

142727231 is a deficient number, since it is larger than the sum of its proper divisors (376969).

142727231 is an equidigital number, since it uses as much as digits as its factorization.

142727231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376968.

The product of its digits is 4704, while the sum is 29.

The square root of 142727231 is about 11946.8502543557. The cubic root of 142727231 is about 522.5994481159.

The spelling of 142727231 in words is "one hundred forty-two million, seven hundred twenty-seven thousand, two hundred thirty-one".