1245389040 has 320 divisors, whose sum is σ = 5062533120. Its totient is φ = 275374080.

The previous prime is 1245389039. The next prime is 1245389053. The reversal of 1245389040 is 409835421.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1245388986 and 1245389004.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 467392 + ... + 470048.

It is an arithmetic number, because the mean of its divisors is an integer number (15820416).

Almost surely, 2^1245389040 is an apocalyptic number.

1245389040 is a gapful number since it is divisible by the number (10) 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 1245389040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2531266560).

1245389040 is an abundant number, since it is smaller than the sum of its proper divisors (3817144080).

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

1245389040 is a wasteful number, since it uses less digits than its factorization.

1245389040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2717 (or 2705 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1245389040 is about 35290.0699914296. The cubic root of 1245389040 is about 1075.8911780790.

The spelling of 1245389040 in words is "one billion, two hundred forty-five million, three hundred eighty-nine thousand, forty".