142749853 has 2 divisors, whose sum is σ = 142749854. Its totient is φ = 142749852.

The previous prime is 142749839. The next prime is 142749889. The reversal of 142749853 is 358947241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142730809 + 19044 = 11947^2 + 138^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142749853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142749053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71374926 + 71374927.

It is an arithmetic number, because the mean of its divisors is an integer number (71374927).

Almost surely, 2^142749853 is an apocalyptic number.

It is an amenable number.

142749853 is a deficient number, since it is larger than the sum of its proper divisors (1).

142749853 is an equidigital number, since it uses as much as digits as its factorization.

142749853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 43.

The square root of 142749853 is about 11947.7969935884. The cubic root of 142749853 is about 522.6270570033.

The spelling of 142749853 in words is "one hundred forty-two million, seven hundred forty-nine thousand, eight hundred fifty-three".