129251333 has 2 divisors, whose sum is σ = 129251334. Its totient is φ = 129251332.

The previous prime is 129251267. The next prime is 129251387. The reversal of 129251333 is 333152921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68442529 + 60808804 = 8273^2 + 7798^2 .

It is a cyclic number.

It is not a de Polignac number, because 129251333 - 2¹⁴ = 129234949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129251296 and 129251305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129250333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64625666 + 64625667.

It is an arithmetic number, because the mean of its divisors is an integer number (64625667).

Almost surely, 2^129251333 is an apocalyptic number.

It is an amenable number.

129251333 is a deficient number, since it is larger than the sum of its proper divisors (1).

129251333 is an equidigital number, since it uses as much as digits as its factorization.

129251333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 29.

The square root of 129251333 is about 11368.8756260239. The cubic root of 129251333 is about 505.6053688513.

It can be divided in two parts, 1292 and 51333, that added together give a palindrome (52625).

The spelling of 129251333 in words is "one hundred twenty-nine million, two hundred fifty-one thousand, three hundred thirty-three".