142721320 has 48 divisors (see below), whose sum is σ = 373556340. Its totient is φ = 48932352.

The previous prime is 142721297. The next prime is 142721329. The reversal of 142721320 is 23127241.

It can be written as a sum of positive squares in 2 ways, for example, as 141943396 + 777924 = 11914^2 + 882^2 .

It is a junction number, because it is equal to n+sod(n) for n = 142721291 and 142721300.

It is not an unprimeable number, because it can be changed into a prime (142721329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34449 + ... + 38368.

Almost surely, 2^142721320 is an apocalyptic number.

142721320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142721320 is an abundant number, since it is smaller than the sum of its proper divisors (230835020).

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

142721320 is a wasteful number, since it uses less digits than its factorization.

142721320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72842 (or 72831 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 142721320 is about 11946.6028644130. The cubic root of 142721320 is about 522.5922335898.

Adding to 142721320 its reverse (23127241), we get a palindrome (165848561).

The spelling of 142721320 in words is "one hundred forty-two million, seven hundred twenty-one thousand, three hundred twenty".