1245245285 has 4 divisors (see below), whose sum is σ = 1494294348. Its totient is φ = 996196224.

The previous prime is 1245245269. The next prime is 1245245311. The reversal of 1245245285 is 5825425421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5825425421 = 62071 ⋅93851.

It can be written as a sum of positive squares in 2 ways, for example, as 732947329 + 512297956 = 27073^2 + 22634^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245245285 - 2⁴ = 1245245269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124524524 + ... + 124524533.

It is an arithmetic number, because the mean of its divisors is an integer number (373573587).

Almost surely, 2^1245245285 is an apocalyptic number.

It is an amenable number.

1245245285 is a deficient number, since it is larger than the sum of its proper divisors (249049063).

1245245285 is an equidigital number, since it uses as much as digits as its factorization.

1245245285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249049062.

The product of its digits is 128000, while the sum is 38.

The square root of 1245245285 is about 35288.0331699005. The cubic root of 1245245285 is about 1075.8497798538.

The spelling of 1245245285 in words is "one billion, two hundred forty-five million, two hundred forty-five thousand, two hundred eighty-five".