142651 has 4 divisors (see below), whose sum is σ = 147600. Its totient is φ = 137704.

The previous prime is 142619. The next prime is 142657. The reversal of 142651 is 156241.

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 142651 - 2⁵ = 142619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142657) 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, 2431 + ... + 2488.

It is an arithmetic number, because the mean of its divisors is an integer number (36900).

2¹⁴²⁶⁵¹ is an apocalyptic number.

142651 is a deficient number, since it is larger than the sum of its proper divisors (4949).

142651 is an equidigital number, since it uses as much as digits as its factorization.

142651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4948.

The product of its digits is 240, while the sum is 19.

The square root of 142651 is about 377.6916731939. The cubic root of 142651 is about 52.2506390954.

Adding to 142651 its reverse (156241), we get a palindrome (298892).

The spelling of 142651 in words is "one hundred forty-two thousand, six hundred fifty-one".