142105540 has 48 divisors (see below), whose sum is σ = 306871488. Its totient is φ = 55246464.

The previous prime is 142105517. The next prime is 142105553. The reversal of 142105540 is 45501241.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320559 + ... + 321001.

It is an arithmetic number, because the mean of its divisors is an integer number (6393156).

Almost surely, 2^142105540 is an apocalyptic number.

142105540 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 142105540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153435744).

142105540 is an abundant number, since it is smaller than the sum of its proper divisors (164765948).

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

142105540 is a wasteful number, since it uses less digits than its factorization.

142105540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 142105540 is about 11920.8028253134. The cubic root of 142105540 is about 521.8395645200.

Adding to 142105540 its reverse (45501241), we get a palindrome (187606781).

The spelling of 142105540 in words is "one hundred forty-two million, one hundred five thousand, five hundred forty".