142748861 has 2 divisors, whose sum is σ = 142748862. Its totient is φ = 142748860.

The previous prime is 142748857. The next prime is 142748867. The reversal of 142748861 is 168847241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139381636 + 3367225 = 11806^2 + 1835^2 .

It is a cyclic number.

It is not a de Polignac number, because 142748861 - 2² = 142748857 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 (142748867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71374430 + 71374431.

It is an arithmetic number, because the mean of its divisors is an integer number (71374431).

Almost surely, 2^142748861 is an apocalyptic number.

It is an amenable number.

142748861 is a deficient number, since it is larger than the sum of its proper divisors (1).

142748861 is an equidigital number, since it uses as much as digits as its factorization.

142748861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 41.

The square root of 142748861 is about 11947.7554795870. The cubic root of 142748861 is about 522.6258463839.

The spelling of 142748861 in words is "one hundred forty-two million, seven hundred forty-eight thousand, eight hundred sixty-one".