1246129849 has 2 divisors, whose sum is σ = 1246129850. Its totient is φ = 1246129848.

The previous prime is 1246129831. The next prime is 1246129921. The reversal of 1246129849 is 9489216421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1052029225 + 194100624 = 32435^2 + 13932^2 .

It is a cyclic number.

It is not a de Polignac number, because 1246129849 - 2²⁹ = 709258937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1246129799 and 1246129808.

It is not a weakly prime, because it can be changed into another prime (1246129249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623064924 + 623064925.

It is an arithmetic number, because the mean of its divisors is an integer number (623064925).

Almost surely, 2^1246129849 is an apocalyptic number.

It is an amenable number.

1246129849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1246129849 is an equidigital number, since it uses as much as digits as its factorization.

1246129849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 46.

The square root of 1246129849 is about 35300.5644289153. The cubic root of 1246129849 is about 1076.1044640105.

The spelling of 1246129849 in words is "one billion, two hundred forty-six million, one hundred twenty-nine thousand, eight hundred forty-nine".