142695881 has 2 divisors, whose sum is σ = 142695882. Its totient is φ = 142695880.

The previous prime is 142695877. The next prime is 142695899. The reversal of 142695881 is 188596241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139240000 + 3455881 = 11800^2 + 1859^2 .

It is a cyclic number.

It is not a de Polignac number, because 142695881 - 2² = 142695877 is a prime.

It is a super-2 number, since 2×142695881² = 40724228908732322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (142695851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71347940 + 71347941.

It is an arithmetic number, because the mean of its divisors is an integer number (71347941).

Almost surely, 2^142695881 is an apocalyptic number.

It is an amenable number.

142695881 is a deficient number, since it is larger than the sum of its proper divisors (1).

142695881 is an equidigital number, since it uses as much as digits as its factorization.

142695881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 44.

The square root of 142695881 is about 11945.5381209889. The cubic root of 142695881 is about 522.5611823688.

The spelling of 142695881 in words is "one hundred forty-two million, six hundred ninety-five thousand, eight hundred eighty-one".