142385540 has 72 divisors (see below), whose sum is σ = 348097176. Its totient is φ = 48716800.

The previous prime is 142385539. The next prime is 142385549. The reversal of 142385540 is 45583241.

142385540 = 335² + 336² + ... + 774².

It can be written as a sum of positive squares in 4 ways, for example, as 13017664 + 129367876 = 3608^2 + 11374^2 .

It is a junction number, because it is equal to n+sod(n) for n = 142385497 and 142385506.

It is not an unprimeable number, because it can be changed into a prime (142385549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39410 + ... + 42870.

It is an arithmetic number, because the mean of its divisors is an integer number (4834683).

Almost surely, 2^142385540 is an apocalyptic number.

142385540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142385540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174048588).

142385540 is an abundant number, since it is smaller than the sum of its proper divisors (205711636).

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

142385540 is a wasteful number, since it uses less digits than its factorization.

142385540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3509 (or 3496 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 142385540 is about 11932.5412213828. The cubic root of 142385540 is about 522.1820780636.

The spelling of 142385540 in words is "one hundred forty-two million, three hundred eighty-five thousand, five hundred forty".