142321520 has 40 divisors (see below), whose sum is σ = 360981360. Its totient is φ = 51752960.

The previous prime is 142321513. The next prime is 142321547. The reversal of 142321520 is 25123241.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×142321520² = 40510830110220800, which contains 22 as substring.

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 = 142321492 and 142321501.

It is a congruent number.

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, 79985 + ... + 81744.

It is an arithmetic number, because the mean of its divisors is an integer number (9024534).

Almost surely, 2^142321520 is an apocalyptic number.

142321520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142321520 is an abundant number, since it is smaller than the sum of its proper divisors (218659840).

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

142321520 is a wasteful number, since it uses less digits than its factorization.

142321520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161753 (or 161747 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 142321520 is about 11929.8583394775. The cubic root of 142321520 is about 522.1038044126.

Adding to 142321520 its reverse (25123241), we get a palindrome (167444761).

The spelling of 142321520 in words is "one hundred forty-two million, three hundred twenty-one thousand, five hundred twenty".