142611281 has 2 divisors, whose sum is σ = 142611282. Its totient is φ = 142611280.

The previous prime is 142611277. The next prime is 142611307. The reversal of 142611281 is 182116241.

It is an a-pointer prime, because the next prime (142611307) can be obtained adding 142611281 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87984400 + 54626881 = 9380^2 + 7391^2 .

It is an emirp because it is prime and its reverse (182116241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142611281 - 2² = 142611277 is a prime.

It is a super-2 number, since 2×142611281² = 40675954936921922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 142611281.

It is not a weakly prime, because it can be changed into another prime (142611881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71305640 + 71305641.

It is an arithmetic number, because the mean of its divisors is an integer number (71305641).

Almost surely, 2^142611281 is an apocalyptic number.

It is an amenable number.

142611281 is a deficient number, since it is larger than the sum of its proper divisors (1).

142611281 is an equidigital number, since it uses as much as digits as its factorization.

142611281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 26.

The square root of 142611281 is about 11941.9965248697. The cubic root of 142611281 is about 522.4578918013.

The spelling of 142611281 in words is "one hundred forty-two million, six hundred eleven thousand, two hundred eighty-one".