1245764044 has 36 divisors (see below), whose sum is σ = 2545157160. Its totient is φ = 531975360.

The previous prime is 1245764041. The next prime is 1245764087. The reversal of 1245764044 is 4404675421.

It is a junction number, because it is equal to n+sod(n) for n = 1245763994 and 1245764012.

It is not an unprimeable number, because it can be changed into a prime (1245764041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43767 + ... + 66385.

It is an arithmetic number, because the mean of its divisors is an integer number (70698810).

Almost surely, 2^1245764044 is an apocalyptic number.

1245764044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245764044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1272578580).

1245764044 is an abundant number, since it is smaller than the sum of its proper divisors (1299393116).

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

1245764044 is a wasteful number, since it uses less digits than its factorization.

1245764044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22918 (or 22909 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 37.

The square root of 1245764044 is about 35295.3827575223. The cubic root of 1245764044 is about 1075.9991558522. Note that the first 3 decimals are identical.

The spelling of 1245764044 in words is "one billion, two hundred forty-five million, seven hundred sixty-four thousand, forty-four".