142321140 has 72 divisors (see below), whose sum is σ = 464923368. Its totient is φ = 35032320.

The previous prime is 142321139. The next prime is 142321141. The reversal of 142321140 is 41123241.

It is an interprime number because it is at equal distance from previous prime (142321139) and next prime (142321141).

It can be written as a sum of positive squares in 4 ways, for example, as 3175524 + 139145616 = 1782^2 + 11796^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142321141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28071 + ... + 32750.

It is an arithmetic number, because the mean of its divisors is an integer number (6457269).

Almost surely, 2^142321140 is an apocalyptic number.

142321140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142321140 is an abundant number, since it is smaller than the sum of its proper divisors (322602228).

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

142321140 is a wasteful number, since it uses less digits than its factorization.

142321140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60849 (or 60844 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 142321140 is about 11929.8424130413. The cubic root of 142321140 is about 522.1033397379.

Adding to 142321140 its reverse (41123241), we get a palindrome (183444381).

The spelling of 142321140 in words is "one hundred forty-two million, three hundred twenty-one thousand, one hundred forty".