142257 has 4 divisors (see below), whose sum is σ = 189680. Its totient is φ = 94836.

The previous prime is 142237. The next prime is 142271. The reversal of 142257 is 752241.

142257 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 142257 - 2⁶ = 142193 is a prime.

It is a D-number.

It is a Duffinian number.

142257 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 142257.

It is not an unprimeable number, because it can be changed into a prime (142217) 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, 23707 + ... + 23712.

It is an arithmetic number, because the mean of its divisors is an integer number (47420).

2¹⁴²²⁵⁷ is an apocalyptic number.

It is an amenable number.

142257 is a deficient number, since it is larger than the sum of its proper divisors (47423).

142257 is an equidigital number, since it uses as much as digits as its factorization.

142257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47422.

The product of its digits is 560, while the sum is 21.

The square root of 142257 is about 377.1697230691. The cubic root of 142257 is about 52.2024895687.

Adding to 142257 its reverse (752241), we get a palindrome (894498).

The spelling of 142257 in words is "one hundred forty-two thousand, two hundred fifty-seven".