142515281 has 2 divisors, whose sum is σ = 142515282. Its totient is φ = 142515280.

The previous prime is 142515271. The next prime is 142515299. The reversal of 142515281 is 182515241.

142515281 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., 121903681 + 20611600 = 11041^2 + 4540^2 .

It is a cyclic number.

It is not a de Polignac number, because 142515281 - 2²⁶ = 75406417 is a prime.

It is a super-2 number, since 2×142515281² = 40621210637017922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142515271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71257640 + 71257641.

It is an arithmetic number, because the mean of its divisors is an integer number (71257641).

Almost surely, 2^142515281 is an apocalyptic number.

It is an amenable number.

142515281 is a deficient number, since it is larger than the sum of its proper divisors (1).

142515281 is an equidigital number, since it uses as much as digits as its factorization.

142515281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3200, while the sum is 29.

The square root of 142515281 is about 11937.9764198125. The cubic root of 142515281 is about 522.3406331577.

The spelling of 142515281 in words is "one hundred forty-two million, five hundred fifteen thousand, two hundred eighty-one".