129262481 has 2 divisors, whose sum is σ = 129262482. Its totient is φ = 129262480.

The previous prime is 129262459. The next prime is 129262489. The reversal of 129262481 is 184262921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120648256 + 8614225 = 10984^2 + 2935^2 .

It is an emirp because it is prime and its reverse (184262921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129262481 - 2¹⁴ = 129246097 is a prime.

It is a super-2 number, since 2×129262481² = 33417577988550722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129262489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64631240 + 64631241.

It is an arithmetic number, because the mean of its divisors is an integer number (64631241).

Almost surely, 2^129262481 is an apocalyptic number.

It is an amenable number.

129262481 is a deficient number, since it is larger than the sum of its proper divisors (1).

129262481 is an equidigital number, since it uses as much as digits as its factorization.

129262481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 35.

The square root of 129262481 is about 11369.3659014036. The cubic root of 129262481 is about 505.6199046823.

The spelling of 129262481 in words is "one hundred twenty-nine million, two hundred sixty-two thousand, four hundred eighty-one".