129455441 has 2 divisors, whose sum is σ = 129455442. Its totient is φ = 129455440.

The previous prime is 129455429. The next prime is 129455461. The reversal of 129455441 is 144554921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112678225 + 16777216 = 10615^2 + 4096^2 .

It is a cyclic number.

It is not a de Polignac number, because 129455441 - 2⁶ = 129455377 is a prime.

It is a super-2 number, since 2×129455441² = 33517422409008962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129455461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64727720 + 64727721.

It is an arithmetic number, because the mean of its divisors is an integer number (64727721).

Almost surely, 2^129455441 is an apocalyptic number.

It is an amenable number.

129455441 is a deficient number, since it is larger than the sum of its proper divisors (1).

129455441 is an equidigital number, since it uses as much as digits as its factorization.

129455441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 35.

The square root of 129455441 is about 11377.8486982382. The cubic root of 129455441 is about 505.8713721073.

The spelling of 129455441 in words is "one hundred twenty-nine million, four hundred fifty-five thousand, four hundred forty-one".