142573781 has 24 divisors (see below), whose sum is σ = 176472000. Its totient is φ = 114787008.

The previous prime is 142573771. The next prime is 142573807. The reversal of 142573781 is 187375241.

142573781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-142573781 is a prime.

It is a super-2 number, since 2×142573781² = 40654566057271922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142573771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 285470 + ... + 285968.

It is an arithmetic number, because the mean of its divisors is an integer number (7353000).

Almost surely, 2^142573781 is an apocalyptic number.

It is an amenable number.

142573781 is a deficient number, since it is larger than the sum of its proper divisors (33898219).

142573781 is an frugal number, since it uses more digits than its factorization.

142573781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551 (or 523 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 142573781 is about 11940.4263324221. The cubic root of 142573781 is about 522.4120939085.

The spelling of 142573781 in words is "one hundred forty-two million, five hundred seventy-three thousand, seven hundred eighty-one".