1249036729 has 2 divisors, whose sum is σ = 1249036730. Its totient is φ = 1249036728.

The previous prime is 1249036727. The next prime is 1249036739. The reversal of 1249036729 is 9276309421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1230957225 + 18079504 = 35085^2 + 4252^2 .

It is a cyclic number.

It is not a de Polignac number, because 1249036729 - 2¹ = 1249036727 is a prime.

Together with 1249036727, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1249036727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624518364 + 624518365.

It is an arithmetic number, because the mean of its divisors is an integer number (624518365).

Almost surely, 2^1249036729 is an apocalyptic number.

It is an amenable number.

1249036729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249036729 is an equidigital number, since it uses as much as digits as its factorization.

1249036729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 1249036729 is about 35341.7137247191. The cubic root of 1249036729 is about 1076.9405666460.

The spelling of 1249036729 in words is "one billion, two hundred forty-nine million, thirty-six thousand, seven hundred twenty-nine".