142261 has 4 divisors (see below), whose sum is σ = 162592. Its totient is φ = 121932.

The previous prime is 142237. The next prime is 142271. The reversal of 142261 is 162241.

142261 is nontrivially palindromic in base 11.

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, and also an emirpimes, since its reverse is a distinct semiprime: 162241 = 19 ⋅8539.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142261 is a prime.

It is a Duffinian number.

142261 is an undulating number in base 11.

142261 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142211) 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, 10155 + ... + 10168.

It is an arithmetic number, because the mean of its divisors is an integer number (40648).

2¹⁴²²⁶¹ is an apocalyptic number.

It is an amenable number.

142261 is a deficient number, since it is larger than the sum of its proper divisors (20331).

142261 is an equidigital number, since it uses as much as digits as its factorization.

142261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20330.

The product of its digits is 96, while the sum is 16.

The square root of 142261 is about 377.1750256844. The cubic root of 142261 is about 52.2029788428.

The spelling of 142261 in words is "one hundred forty-two thousand, two hundred sixty-one".