1261124429 has 2 divisors, whose sum is σ = 1261124430. Its totient is φ = 1261124428.

The previous prime is 1261124387. The next prime is 1261124471. The reversal of 1261124429 is 9244211621.

It is a balanced prime because it is at equal distance from previous prime (1261124387) and next prime (1261124471).

It can be written as a sum of positive squares in only one way, i.e., 1117364329 + 143760100 = 33427^2 + 11990^2 .

It is an emirp because it is prime and its reverse (9244211621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1261124429 - 2²⁴ = 1244347213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1261124395 and 1261124404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1261124489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630562214 + 630562215.

It is an arithmetic number, because the mean of its divisors is an integer number (630562215).

Almost surely, 2^1261124429 is an apocalyptic number.

It is an amenable number.

1261124429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1261124429 is an equidigital number, since it uses as much as digits as its factorization.

1261124429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The square root of 1261124429 is about 35512.3137657912. The cubic root of 1261124429 is about 1080.4034926389.

The spelling of 1261124429 in words is "one billion, two hundred sixty-one million, one hundred twenty-four thousand, four hundred twenty-nine".