129754881 has 9 divisors (see below), whose sum is σ = 187473091. Its totient is φ = 86480472.

The previous prime is 129754879. The next prime is 129754883. The reversal of 129754881 is 188457921.

The square root of 129754881 is 11391.

It is a perfect power (a square), and thus also a powerful number.

129754881 is a `hidden beast` number, since 1 + 29 + 7 + 548 + 81 = 666.

It is an interprime number because it is at equal distance from previous prime (129754879) and next prime (129754883).

It can be written as a sum of positive squares in only one way, i.e., 1703025 + 128051856 = 1305^2 + 11316^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 129754881 - 2¹ = 129754879 is a prime.

It is a super-2 number, since 2×129754881² = 33672658286648322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129754883) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 32275 + ... + 36071.

Almost surely, 2^129754881 is an apocalyptic number.

129754881 is the 11391-st square number.

129754881 is the 5696-th centered octagonal number.

It is an amenable number.

129754881 is a deficient number, since it is larger than the sum of its proper divisors (57718210).

129754881 is an frugal number, since it uses more digits than its factorization.

129754881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7600 (or 3800 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The cubic root of 129754881 is about 506.2611110501.

The spelling of 129754881 in words is "one hundred twenty-nine million, seven hundred fifty-four thousand, eight hundred eighty-one".