1296867245 has 8 divisors (see below), whose sum is σ = 1556714616. Its totient is φ = 1037177856.

The previous prime is 1296867241. The next prime is 1296867251. The reversal of 1296867245 is 5427686921.

It can be written as a sum of positive squares in 4 ways, for example, as 310781641 + 986085604 = 17629^2 + 31402^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1296867245 - 2² = 1296867241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1296867193 and 1296867202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296867241) 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, 20612 + ... + 54941.

It is an arithmetic number, because the mean of its divisors is an integer number (194589327).

Almost surely, 2^1296867245 is an apocalyptic number.

It is an amenable number.

1296867245 is a deficient number, since it is larger than the sum of its proper divisors (259847371).

1296867245 is an equidigital number, since it uses as much as digits as its factorization.

1296867245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78991.

The product of its digits is 1451520, while the sum is 50.

The square root of 1296867245 is about 36012.0430550670. The cubic root of 1296867245 is about 1090.5154941818.

The spelling of 1296867245 in words is "one billion, two hundred ninety-six million, eight hundred sixty-seven thousand, two hundred forty-five".