1245709444 has 12 divisors (see below), whose sum is σ = 2491418944. Its totient is φ = 533875464.

The previous prime is 1245709433. The next prime is 1245709447. The reversal of 1245709444 is 4449075421.

1245709444 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1245709397 and 1245709406.

It is not an unprimeable number, because it can be changed into a prime (1245709447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22244784 + ... + 22244839.

Almost surely, 2^1245709444 is an apocalyptic number.

1245709444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1245709444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1245709444 is a wasteful number, since it uses less digits than its factorization.

1245709444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44489634 (or 44489632 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 1245709444 is about 35294.6092767720. The cubic root of 1245709444 is about 1075.9834358040.

The spelling of 1245709444 in words is "one billion, two hundred forty-five million, seven hundred nine thousand, four hundred forty-four".