142222520 has 32 divisors (see below), whose sum is σ = 349092720. Its totient is φ = 51717120.

The previous prime is 142222519. The next prime is 142222523. The reversal of 142222520 is 25222241.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 142222492 and 142222501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142222523) 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, 161177 + ... + 162056.

Almost surely, 2^142222520 is an apocalyptic number.

142222520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142222520 is an abundant number, since it is smaller than the sum of its proper divisors (206870200).

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

142222520 is a wasteful number, since it uses less digits than its factorization.

142222520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323255 (or 323251 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 142222520 is about 11925.7083647052. The cubic root of 142222520 is about 521.9827164558.

Adding to 142222520 its reverse (25222241), we get a palindrome (167444761).

The spelling of 142222520 in words is "one hundred forty-two million, two hundred twenty-two thousand, five hundred twenty".