142028881 has 2 divisors, whose sum is σ = 142028882. Its totient is φ = 142028880.

The previous prime is 142028867. The next prime is 142028941. The reversal of 142028881 is 188820241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114832656 + 27196225 = 10716^2 + 5215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142028881 is a prime.

It is a super-2 number, since 2×142028881² = 40344406076224322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142028851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71014440 + 71014441.

It is an arithmetic number, because the mean of its divisors is an integer number (71014441).

Almost surely, 2^142028881 is an apocalyptic number.

It is an amenable number.

142028881 is a deficient number, since it is larger than the sum of its proper divisors (1).

142028881 is an equidigital number, since it uses as much as digits as its factorization.

142028881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8192, while the sum is 34.

The square root of 142028881 is about 11917.5870460425. The cubic root of 142028881 is about 521.7457119869.

The spelling of 142028881 in words is "one hundred forty-two million, twenty-eight thousand, eight hundred eighty-one".