142087540 has 48 divisors (see below), whose sum is σ = 344558592. Its totient is φ = 48208896.

The previous prime is 142087499. The next prime is 142087549. The reversal of 142087540 is 45780241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142087549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8349 + ... + 18811.

It is an arithmetic number, because the mean of its divisors is an integer number (7178304).

Almost surely, 2^142087540 is an apocalyptic number.

142087540 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 142087540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172279296).

142087540 is an abundant number, since it is smaller than the sum of its proper divisors (202471052).

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

142087540 is a wasteful number, since it uses less digits than its factorization.

142087540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10576 (or 10574 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 142087540 is about 11920.0478186960. The cubic root of 142087540 is about 521.8175304065.

The spelling of 142087540 in words is "one hundred forty-two million, eighty-seven thousand, five hundred forty".