1249578413 has 2 divisors, whose sum is σ = 1249578414. Its totient is φ = 1249578412.

The previous prime is 1249578401. The next prime is 1249578433. The reversal of 1249578413 is 3148759421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1033429609 + 216148804 = 32147^2 + 14702^2 .

It is a cyclic number.

It is not a de Polignac number, because 1249578413 - 2⁴ = 1249578397 is a prime.

It is a super-2 number, since 2×1249578413² = 3122892420471197138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1249578433) 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, 624789206 + 624789207.

It is an arithmetic number, because the mean of its divisors is an integer number (624789207).

Almost surely, 2^1249578413 is an apocalyptic number.

It is an amenable number.

1249578413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249578413 is an equidigital number, since it uses as much as digits as its factorization.

1249578413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 44.

The square root of 1249578413 is about 35349.3764159992. The cubic root of 1249578413 is about 1077.0962271774.

The spelling of 1249578413 in words is "one billion, two hundred forty-nine million, five hundred seventy-eight thousand, four hundred thirteen".