142420 has 12 divisors (see below), whose sum is σ = 299124. Its totient is φ = 56960.

The previous prime is 142403. The next prime is 142421. The reversal of 142420 is 24241.

It can be written as a sum of positive squares in 2 ways, for example, as 21316 + 121104 = 146^2 + 348^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 142420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3541 + ... + 3580.

It is an arithmetic number, because the mean of its divisors is an integer number (24927).

2¹⁴²⁴²⁰ is an apocalyptic number.

142420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142420 is an abundant number, since it is smaller than the sum of its proper divisors (156704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142420 is a wasteful number, since it uses less digits than its factorization.

142420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7130 (or 7128 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 142420 is about 377.3857442989. The cubic root of 142420 is about 52.2224200653. Note that the first 3 decimals are identical.

Adding to 142420 its reverse (24241), we get a palindrome (166661).

It can be divided in two parts, 1424 and 20, that added together give a square (1444 = 38²).

The spelling of 142420 in words is "one hundred forty-two thousand, four hundred twenty", and thus it is an iban number.