1298353745 has 8 divisors (see below), whose sum is σ = 1677872616. Its totient is φ = 958784256.

The previous prime is 1298353741. The next prime is 1298353747. The reversal of 1298353745 is 5473538921.

It can be written as a sum of positive squares in 4 ways, for example, as 52475536 + 1245878209 = 7244^2 + 35297^2 .

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 1298353745 - 2² = 1298353741 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1298353745.

It is not an unprimeable number, because it can be changed into a prime (1298353741) 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, 9987272 + ... + 9987401.

It is an arithmetic number, because the mean of its divisors is an integer number (209734077).

Almost surely, 2^1298353745 is an apocalyptic number.

It is an amenable number.

1298353745 is a deficient number, since it is larger than the sum of its proper divisors (379518871).

1298353745 is a wasteful number, since it uses less digits than its factorization.

1298353745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19974691.

The product of its digits is 907200, while the sum is 47.

The square root of 1298353745 is about 36032.6760732533. The cubic root of 1298353745 is about 1090.9319933313.

The spelling of 1298353745 in words is "one billion, two hundred ninety-eight million, three hundred fifty-three thousand, seven hundred forty-five".