129751001 has 2 divisors, whose sum is σ = 129751002. Its totient is φ = 129751000.

The previous prime is 129750979. The next prime is 129751031. The reversal of 129751001 is 100157921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92833225 + 36917776 = 9635^2 + 6076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129751001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129751031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64875500 + 64875501.

It is an arithmetic number, because the mean of its divisors is an integer number (64875501).

Almost surely, 2^129751001 is an apocalyptic number.

It is an amenable number.

129751001 is a deficient number, since it is larger than the sum of its proper divisors (1).

129751001 is an equidigital number, since it uses as much as digits as its factorization.

129751001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 129751001 is about 11390.8296888330. The cubic root of 129751001 is about 506.2560648361.

The spelling of 129751001 in words is "one hundred twenty-nine million, seven hundred fifty-one thousand, one".