142191224 has 32 divisors (see below), whose sum is σ = 305601120. Its totient is φ = 60758016.

The previous prime is 142191197. The next prime is 142191229. The reversal of 142191224 is 422191241.

142191224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 142191193 and 142191202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142191229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16172 + ... + 23364.

It is an arithmetic number, because the mean of its divisors is an integer number (9550035).

Almost surely, 2^142191224 is an apocalyptic number.

142191224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

142191224 is an abundant number, since it is smaller than the sum of its proper divisors (163409896).

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

142191224 is a wasteful number, since it uses less digits than its factorization.

142191224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7559 (or 7555 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 142191224 is about 11924.3961691987. The cubic root of 142191224 is about 521.9444262950.

The spelling of 142191224 in words is "one hundred forty-two million, one hundred ninety-one thousand, two hundred twenty-four".