142431220 has 24 divisors (see below), whose sum is σ = 314848800. Its totient is φ = 53973792.

The previous prime is 142431187. The next prime is 142431221. The reversal of 142431220 is 22134241.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142431221) 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, 187030 + ... + 187789.

It is an arithmetic number, because the mean of its divisors is an integer number (13118700).

Almost surely, 2^142431220 is an apocalyptic number.

142431220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142431220 is an abundant number, since it is smaller than the sum of its proper divisors (172417580).

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

142431220 is a wasteful number, since it uses less digits than its factorization.

142431220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374847 (or 374845 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 142431220 is about 11934.4551614223. The cubic root of 142431220 is about 522.2379140868.

Adding to 142431220 its reverse (22134241), we get a palindrome (164565461).

The spelling of 142431220 in words is "one hundred forty-two million, four hundred thirty-one thousand, two hundred twenty".