142765840 has 160 divisors (see below), whose sum is σ = 401760000. Its totient is φ = 46147584.

The previous prime is 142765787. The next prime is 142765841. The reversal of 142765840 is 48567241.

It is a self number, because there is not a number n which added to its sum of digits gives 142765840.

It is not an unprimeable number, because it can be changed into a prime (142765841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 958086 + ... + 958234.

It is an arithmetic number, because the mean of its divisors is an integer number (2511000).

Almost surely, 2^142765840 is an apocalyptic number.

142765840 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 142765840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200880000).

142765840 is an abundant number, since it is smaller than the sum of its proper divisors (258994160).

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

142765840 is a wasteful number, since it uses less digits than its factorization.

142765840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 142765840 is about 11948.4660103295. The cubic root of 142765840 is about 522.6465664849.

The spelling of 142765840 in words is "one hundred forty-two million, seven hundred sixty-five thousand, eight hundred forty".