142678901 has 2 divisors, whose sum is σ = 142678902. Its totient is φ = 142678900.

The previous prime is 142678889. The next prime is 142678997. The reversal of 142678901 is 109876241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140398801 + 2280100 = 11849^2 + 1510^2 .

It is an emirp because it is prime and its reverse (109876241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142678901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142678801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71339450 + 71339451.

It is an arithmetic number, because the mean of its divisors is an integer number (71339451).

Almost surely, 2^142678901 is an apocalyptic number.

It is an amenable number.

142678901 is a deficient number, since it is larger than the sum of its proper divisors (1).

142678901 is an equidigital number, since it uses as much as digits as its factorization.

142678901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 142678901 is about 11944.8273742235. The cubic root of 142678901 is about 522.5404542749.

The spelling of 142678901 in words is "one hundred forty-two million, six hundred seventy-eight thousand, nine hundred one".