142421224 has 32 divisors (see below), whose sum is σ = 291794400. Its totient is φ = 64630720.

The previous prime is 142421183. The next prime is 142421239. The reversal of 142421224 is 422124241.

142421224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 142421195 and 142421204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82482 + ... + 84190.

It is an arithmetic number, because the mean of its divisors is an integer number (9118575).

Almost surely, 2^142421224 is an apocalyptic number.

It is an amenable number.

142421224 is an abundant number, since it is smaller than the sum of its proper divisors (149373176).

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

142421224 is a wasteful number, since it uses less digits than its factorization.

142421224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2673 (or 2669 counting only the distinct ones).

The product of its digits is 1024, while the sum is 22.

The square root of 142421224 is about 11934.0363666280. The cubic root of 142421224 is about 522.2256966990.

Adding to 142421224 its reverse (422124241), we get a palindrome (564545465).

The spelling of 142421224 in words is "one hundred forty-two million, four hundred twenty-one thousand, two hundred twenty-four".