142115540 has 48 divisors (see below), whose sum is σ = 343805952. Its totient is φ = 48335616.

The previous prime is 142115539. The next prime is 142115569. The reversal of 142115540 is 45511241.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13784 + ... + 21776.

It is an arithmetic number, because the mean of its divisors is an integer number (7162624).

Almost surely, 2^142115540 is an apocalyptic number.

142115540 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 142115540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171902976).

142115540 is an abundant number, since it is smaller than the sum of its proper divisors (201690412).

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

142115540 is a wasteful number, since it uses less digits than its factorization.

142115540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8136 (or 8134 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 142115540 is about 11921.2222527726. Note that the first 4 decimals coincide. The cubic root of 142115540 is about 521.8518048902.

Adding to 142115540 its reverse (45511241), we get a palindrome (187626781).

It can be divided in two parts, 1421 and 15540, that added together give a palindrome (16961).

The spelling of 142115540 in words is "one hundred forty-two million, one hundred fifteen thousand, five hundred forty".