1249396361 has 8 divisors (see below), whose sum is σ = 1262598024. Its totient is φ = 1236211200.

The previous prime is 1249396339. The next prime is 1249396367. The reversal of 1249396361 is 1636939421.

It can be written as a sum of positive squares in 4 ways, for example, as 1067982400 + 181413961 = 32680^2 + 13469^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1249396361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1249396367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200651 + ... + 206783.

It is an arithmetic number, because the mean of its divisors is an integer number (157824753).

Almost surely, 2^1249396361 is an apocalyptic number.

It is an amenable number.

1249396361 is a deficient number, since it is larger than the sum of its proper divisors (13201663).

1249396361 is a wasteful number, since it uses less digits than its factorization.

1249396361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8251.

The product of its digits is 209952, while the sum is 44.

The square root of 1249396361 is about 35346.8012838503. The cubic root of 1249396361 is about 1077.0439169893.

The spelling of 1249396361 in words is "one billion, two hundred forty-nine million, three hundred ninety-six thousand, three hundred sixty-one".