142781000 has 64 divisors (see below), whose sum is σ = 338981760. Its totient is φ = 56280000.

The previous prime is 142780933. The next prime is 142781021. The reversal of 142781000 is 187241.

It is a super-2 number, since 2×142781000² = 40772827922000000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69995 + ... + 72005.

It is an arithmetic number, because the mean of its divisors is an integer number (5296590).

Almost surely, 2^142781000 is an apocalyptic number.

142781000 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 142781000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169490880).

142781000 is an abundant number, since it is smaller than the sum of its proper divisors (196200760).

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

142781000 is a wasteful number, since it uses less digits than its factorization.

142781000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103 (or 2089 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 142781000 is about 11949.1003845478. The cubic root of 142781000 is about 522.6650654048.

The spelling of 142781000 in words is "one hundred forty-two million, seven hundred eighty-one thousand".