142781340 has 72 divisors (see below), whose sum is σ = 432937008. Its totient is φ = 35143680.

The previous prime is 142781323. The next prime is 142781369. The reversal of 142781340 is 43187241.

It is a super-2 number, since 2×142781340² = 40773022104391200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 142781298 and 142781307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3100 + ... + 17180.

It is an arithmetic number, because the mean of its divisors is an integer number (6013014).

Almost surely, 2^142781340 is an apocalyptic number.

142781340 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 142781340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216468504).

142781340 is an abundant number, since it is smaller than the sum of its proper divisors (290155668).

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

142781340 is a wasteful number, since it uses less digits than its factorization.

142781340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14119 (or 14104 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 142781340 is about 11949.1146115518. The cubic root of 142781340 is about 522.6654802732.

The spelling of 142781340 in words is "one hundred forty-two million, seven hundred eighty-one thousand, three hundred forty".