142854781 has 2 divisors, whose sum is σ = 142854782. Its totient is φ = 142854780.

The previous prime is 142854763. The next prime is 142854809. The reversal of 142854781 is 187458241.

142854781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127125625 + 15729156 = 11275^2 + 3966^2 .

It is a cyclic number.

It is not a de Polignac number, because 142854781 - 2⁹ = 142854269 is a prime.

It is a super-2 number, since 2×142854781² = 40814976909115922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142854731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71427390 + 71427391.

It is an arithmetic number, because the mean of its divisors is an integer number (71427391).

Almost surely, 2^142854781 is an apocalyptic number.

It is an amenable number.

142854781 is a deficient number, since it is larger than the sum of its proper divisors (1).

142854781 is an equidigital number, since it uses as much as digits as its factorization.

142854781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71680, while the sum is 40.

The square root of 142854781 is about 11952.1872893626. The cubic root of 142854781 is about 522.7550776397.

The spelling of 142854781 in words is "one hundred forty-two million, eight hundred fifty-four thousand, seven hundred eighty-one".