129962449 has 2 divisors, whose sum is σ = 129962450. Its totient is φ = 129962448.

The previous prime is 129962431. The next prime is 129962471. The reversal of 129962449 is 944269921.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129231424 + 731025 = 11368^2 + 855^2 .

It is a cyclic number.

It is not a de Polignac number, because 129962449 - 2²³ = 121573841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129962399 and 129962408.

It is not a weakly prime, because it can be changed into another prime (129962429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64981224 + 64981225.

It is an arithmetic number, because the mean of its divisors is an integer number (64981225).

Almost surely, 2^129962449 is an apocalyptic number.

It is an amenable number.

129962449 is a deficient number, since it is larger than the sum of its proper divisors (1).

129962449 is an equidigital number, since it uses as much as digits as its factorization.

129962449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 46.

The square root of 129962449 is about 11400.1074117747. The cubic root of 129962449 is about 506.5309213812.

It can be divided in two parts, 129 and 962449, that added together give a triangular number (962578 = T₁₃₈₇).

The spelling of 129962449 in words is "one hundred twenty-nine million, nine hundred sixty-two thousand, four hundred forty-nine".