142819 has 4 divisors (see below), whose sum is σ = 143640. Its totient is φ = 142000.

The previous prime is 142811. The next prime is 142837. The reversal of 142819 is 918241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 918241 = 757 ⋅1213.

It is a cyclic number.

It is not a de Polignac number, because 142819 - 2³ = 142811 is a prime.

It is a super-2 number, since 2×142819² = 40794533522, 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 = 142793 and 142802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142811) 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, 34 + ... + 535.

It is an arithmetic number, because the mean of its divisors is an integer number (35910).

2¹⁴²⁸¹⁹ is an apocalyptic number.

142819 is a deficient number, since it is larger than the sum of its proper divisors (821).

142819 is an equidigital number, since it uses as much as digits as its factorization.

142819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820.

The product of its digits is 576, while the sum is 25.

The square root of 142819 is about 377.9140113835. The cubic root of 142819 is about 52.2711428975.

It can be divided in two parts, 142 and 819, that added together give a square (961 = 31²).

The spelling of 142819 in words is "one hundred forty-two thousand, eight hundred nineteen".