129572243 has 2 divisors, whose sum is σ = 129572244. Its totient is φ = 129572242.

The previous prime is 129572237. The next prime is 129572263. The reversal of 129572243 is 342275921.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129572243 - 2⁸ = 129571987 is a prime.

It is not a weakly prime, because it can be changed into another prime (129572263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64786121 + 64786122.

It is an arithmetic number, because the mean of its divisors is an integer number (64786122).

Almost surely, 2^129572243 is an apocalyptic number.

129572243 is a deficient number, since it is larger than the sum of its proper divisors (1).

129572243 is an equidigital number, since it uses as much as digits as its factorization.

129572243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 129572243 is about 11382.9804093656. The cubic root of 129572243 is about 506.0234682674.

The spelling of 129572243 in words is "one hundred twenty-nine million, five hundred seventy-two thousand, two hundred forty-three".