129995001 has 6 divisors (see below), whose sum is σ = 187770570. Its totient is φ = 86663328.

The previous prime is 129994993. The next prime is 129995003. The reversal of 129995001 is 100599921.

It can be written as a sum of positive squares in only one way, i.e., 111513600 + 18481401 = 10560^2 + 4299^2 .

It is not a de Polignac number, because 129995001 - 2³ = 129994993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129995003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7221936 + ... + 7221953.

It is an arithmetic number, because the mean of its divisors is an integer number (31295095).

Almost surely, 2^129995001 is an apocalyptic number.

It is an amenable number.

129995001 is a deficient number, since it is larger than the sum of its proper divisors (57775569).

129995001 is a wasteful number, since it uses less digits than its factorization.

129995001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14443895 (or 14443892 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 36.

The square root of 129995001 is about 11401.5350282319. The cubic root of 129995001 is about 506.5732085142.

The spelling of 129995001 in words is "one hundred twenty-nine million, nine hundred ninety-five thousand, one".