142772881 has 2 divisors, whose sum is σ = 142772882. Its totient is φ = 142772880.

The previous prime is 142772873. The next prime is 142772923. The reversal of 142772881 is 188277241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111513600 + 31259281 = 10560^2 + 5591^2 .

It is a cyclic number.

It is not a de Polignac number, because 142772881 - 2³ = 142772873 is a prime.

It is a super-2 number, since 2×142772881² = 40768191098080322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142772801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71386440 + 71386441.

It is an arithmetic number, because the mean of its divisors is an integer number (71386441).

Almost surely, 2^142772881 is an apocalyptic number.

It is an amenable number.

142772881 is a deficient number, since it is larger than the sum of its proper divisors (1).

142772881 is an equidigital number, since it uses as much as digits as its factorization.

142772881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50176, while the sum is 40.

The square root of 142772881 is about 11948.7606470295. The cubic root of 142772881 is about 522.6551583954.

The spelling of 142772881 in words is "one hundred forty-two million, seven hundred seventy-two thousand, eight hundred eighty-one".