1198456945 has 12 divisors (see below), whose sum is σ = 1672948404. Its totient is φ = 821798880.

The previous prime is 1198456933. The next prime is 1198456997. The reversal of 1198456945 is 5496548911.

It can be written as a sum of positive squares in 2 ways, for example, as 320875569 + 877581376 = 17913^2 + 29624^2 .

It is not a de Polignac number, because 1198456945 - 2¹¹ = 1198454897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1198456892 and 1198456901.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2445586 + ... + 2446075.

It is an arithmetic number, because the mean of its divisors is an integer number (139412367).

Almost surely, 2^1198456945 is an apocalyptic number.

It is an amenable number.

1198456945 is a deficient number, since it is larger than the sum of its proper divisors (474491459).

1198456945 is an equidigital number, since it uses as much as digits as its factorization.

1198456945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4891680 (or 4891673 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 52.

The square root of 1198456945 is about 34618.7369064788. The cubic root of 1198456945 is about 1062.2028903056.

The spelling of 1198456945 in words is "one billion, one hundred ninety-eight million, four hundred fifty-six thousand, nine hundred forty-five".