142780 has 36 divisors (see below), whose sum is σ = 335160.
Its totient is φ = 51040.
The previous prime is 142771. The next prime is 142787. The reversal of 142780 is 87241.
It is a super-2 number, since 2×1427802 = 40772256800, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (22).
It is a nialpdrome in base 11.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (142787) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2391 + ... + 2449.
It is an arithmetic number, because the mean of its divisors is an integer number (9310).
2142780 is an apocalyptic number.
142780 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 142780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167580).
142780 is an abundant number, since it is smaller than the sum of its proper divisors (192380).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
142780 is a wasteful number, since it uses less digits than its factorization.
142780 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 90 (or 77 counting only the distinct ones).
The product of its (nonzero) digits is 448, while the sum is 22.
The square root of 142780 is about 377.8624088210.
The cubic root of 142780 is about 52.2663845200.
The spelling of 142780 in words is "one hundred forty-two thousand, seven hundred eighty".