1296050249 has 16 divisors (see below), whose sum is σ = 1489353600. Its totient is φ = 1117846656.

The previous prime is 1296050237. The next prime is 1296050251. The reversal of 1296050249 is 9420506921.

It is a cyclic number.

It is not a de Polignac number, because 1296050249 - 2¹⁶ = 1295984713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1296050269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17909 + ... + 53970.

It is an arithmetic number, because the mean of its divisors is an integer number (93084600).

Almost surely, 2^1296050249 is an apocalyptic number.

1296050249 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1296050249 is a deficient number, since it is larger than the sum of its proper divisors (193303351).

1296050249 is a wasteful number, since it uses less digits than its factorization.

1296050249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71984.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 1296050249 is about 36000.6978960131. The cubic root of 1296050249 is about 1090.2864463339.

The spelling of 1296050249 in words is "one billion, two hundred ninety-six million, fifty thousand, two hundred forty-nine".