1249997361 has 8 divisors (see below), whose sum is σ = 1668939840. Its totient is φ = 832193232.

The previous prime is 1249997341. The next prime is 1249997363. The reversal of 1249997361 is 1637999421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1249997361 - 2⁶ = 1249997297 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1249997363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282021 + ... + 286418.

It is an arithmetic number, because the mean of its divisors is an integer number (208617480).

Almost surely, 2^1249997361 is an apocalyptic number.

It is an amenable number.

1249997361 is a deficient number, since it is larger than the sum of its proper divisors (418942479).

1249997361 is an equidigital number, since it uses as much as digits as its factorization.

1249997361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569175.

The product of its digits is 734832, while the sum is 51.

The square root of 1249997361 is about 35355.3017382118. The cubic root of 1249997361 is about 1077.2165869417.

The spelling of 1249997361 in words is "one billion, two hundred forty-nine million, nine hundred ninety-seven thousand, three hundred sixty-one".