129805652 has 12 divisors (see below), whose sum is σ = 237036576. Its totient is φ = 62080920.

The previous prime is 129805633. The next prime is 129805661. The reversal of 129805652 is 256508921.

It is a super-2 number, since 2×129805652² = 33699014582290208, 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 in 3 ways as a sum of consecutive naturals, for example, 705374 + ... + 705557.

It is an arithmetic number, because the mean of its divisors is an integer number (19753048).

Almost surely, 2^129805652 is an apocalyptic number.

It is an amenable number.

129805652 is a deficient number, since it is larger than the sum of its proper divisors (107230924).

129805652 is a wasteful number, since it uses less digits than its factorization.

129805652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410958 (or 1410956 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 129805652 is about 11393.2283396762. The cubic root of 129805652 is about 506.3271330525.

The spelling of 129805652 in words is "one hundred twenty-nine million, eight hundred five thousand, six hundred fifty-two".