129261116 has 6 divisors (see below), whose sum is σ = 226206960. Its totient is φ = 64630556.

The previous prime is 129261107. The next prime is 129261131. The reversal of 129261116 is 611162921.

It is a super-2 number, since 2×129261116² = 33416872219130912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16157636 + ... + 16157643.

It is an arithmetic number, because the mean of its divisors is an integer number (37701160).

Almost surely, 2^129261116 is an apocalyptic number.

It is an amenable number.

129261116 is a deficient number, since it is larger than the sum of its proper divisors (96945844).

129261116 is a wasteful number, since it uses less digits than its factorization.

129261116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32315283 (or 32315281 counting only the distinct ones).

The product of its digits is 1296, while the sum is 29.

The square root of 129261116 is about 11369.3058715121. The cubic root of 129261116 is about 505.6181249094.

The spelling of 129261116 in words is "one hundred twenty-nine million, two hundred sixty-one thousand, one hundred sixteen".