1245320885 has 4 divisors (see below), whose sum is σ = 1494385068. Its totient is φ = 996256704.

The previous prime is 1245320863. The next prime is 1245320897. The reversal of 1245320885 is 5880235421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5880235421 = 1459 ⋅4030319.

It can be written as a sum of positive squares in 2 ways, for example, as 412536721 + 832784164 = 20311^2 + 28858^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245320885 - 2¹² = 1245316789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124532084 + ... + 124532093.

It is an arithmetic number, because the mean of its divisors is an integer number (373596267).

Almost surely, 2^1245320885 is an apocalyptic number.

It is an amenable number.

1245320885 is a deficient number, since it is larger than the sum of its proper divisors (249064183).

1245320885 is an equidigital number, since it uses as much as digits as its factorization.

1245320885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249064182.

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 1245320885 is about 35289.1043383082. The cubic root of 1245320885 is about 1075.8715513603.

The spelling of 1245320885 in words is "one billion, two hundred forty-five million, three hundred twenty thousand, eight hundred eighty-five".