142440219 has 48 divisors (see below), whose sum is σ = 222393600. Its totient is φ = 87645888.

The previous prime is 142440217. The next prime is 142440247. The reversal of 142440219 is 912044241.

It is a happy number.

142440219 is a `hidden beast` number, since 1 + 4 + 2 + 440 + 219 = 666.

It is not a de Polignac number, because 142440219 - 2¹ = 142440217 is a prime.

It is a super-2 number, since 2×142440219² = 40578431977535922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 142440192 and 142440201.

It is not an unprimeable number, because it can be changed into a prime (142440211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1306737 + ... + 1306845.

It is an arithmetic number, because the mean of its divisors is an integer number (4633200).

Almost surely, 2^142440219 is an apocalyptic number.

142440219 is a deficient number, since it is larger than the sum of its proper divisors (79953381).

142440219 is a wasteful number, since it uses less digits than its factorization.

142440219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 142440219 is about 11934.8321730974. The cubic root of 142440219 is about 522.2489124246.

The spelling of 142440219 in words is "one hundred forty-two million, four hundred forty thousand, two hundred nineteen".