142561457 has 2 divisors, whose sum is σ = 142561458. Its totient is φ = 142561456.

The previous prime is 142561451. The next prime is 142561487. The reversal of 142561457 is 754165241.

142561457 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., 139263601 + 3297856 = 11801^2 + 1816^2 .

It is a cyclic number.

It is not a de Polignac number, because 142561457 - 2²⁶ = 75452593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142561451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71280728 + 71280729.

It is an arithmetic number, because the mean of its divisors is an integer number (71280729).

Almost surely, 2^142561457 is an apocalyptic number.

It is an amenable number.

142561457 is a deficient number, since it is larger than the sum of its proper divisors (1).

142561457 is an equidigital number, since it uses as much as digits as its factorization.

142561457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 35.

The square root of 142561457 is about 11939.9102592942. The cubic root of 142561457 is about 522.3970411358.

The spelling of 142561457 in words is "one hundred forty-two million, five hundred sixty-one thousand, four hundred fifty-seven".