129762001 has 16 divisors (see below), whose sum is σ = 142028800. Its totient is φ = 118098000.

The previous prime is 129761999. The next prime is 129762011. The reversal of 129762001 is 100267921.

It is a happy number.

It is a 2-Lehmer number, since φ(129762001) divides (129762001-1)².

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 129762001 - 2¹ = 129761999 is a prime.

It is a deceptive number, since it divides R_129762000.

It is not an unprimeable number, because it can be changed into a prime (129762011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88210 + ... + 89668.

It is an arithmetic number, because the mean of its divisors is an integer number (8876800).

It is a Poulet number, since it divides 2^129762000-1.

Almost surely, 2^129762001 is an apocalyptic number.

It is an amenable number.

129762001 is a deficient number, since it is larger than the sum of its proper divisors (12266799).

129762001 is a wasteful number, since it uses less digits than its factorization.

129762001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 129762001 is about 11391.3125231468. The cubic root of 129762001 is about 506.2703708513.

The spelling of 129762001 in words is "one hundred twenty-nine million, seven hundred sixty-two thousand, one".