128462281 has 2 divisors, whose sum is σ = 128462282. Its totient is φ = 128462280.

The previous prime is 128462237. The next prime is 128462303. The reversal of 128462281 is 182264821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105575625 + 22886656 = 10275^2 + 4784^2 .

It is an emirp because it is prime and its reverse (182264821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128462281 - 2¹³ = 128454089 is a prime.

It is a super-3 number, since 3×128462281³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (128462231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64231140 + 64231141.

It is an arithmetic number, because the mean of its divisors is an integer number (64231141).

Almost surely, 2^128462281 is an apocalyptic number.

It is an amenable number.

128462281 is a deficient number, since it is larger than the sum of its proper divisors (1).

128462281 is an equidigital number, since it uses as much as digits as its factorization.

128462281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12288, while the sum is 34.

The square root of 128462281 is about 11334.1202128793. The cubic root of 128462281 is about 504.5743968277.

The spelling of 128462281 in words is "one hundred twenty-eight million, four hundred sixty-two thousand, two hundred eighty-one".