1245513040 has 80 divisors (see below), whose sum is σ = 3001950720. Its totient is φ = 480084480.

The previous prime is 1245513013. The next prime is 1245513097. The reversal of 1245513040 is 403155421.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 1245512996 and 1245513014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 666187 + ... + 668053.

It is an arithmetic number, because the mean of its divisors is an integer number (37524384).

Almost surely, 2^1245513040 is an apocalyptic number.

1245513040 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 1245513040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1500975360).

1245513040 is an abundant number, since it is smaller than the sum of its proper divisors (1756437680).

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

1245513040 is a wasteful number, since it uses less digits than its factorization.

1245513040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180 (or 2174 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1245513040 is about 35291.8268158507. The cubic root of 1245513040 is about 1075.9268847469.

Adding to 1245513040 its reverse (403155421), we get a palindrome (1648668461).

The spelling of 1245513040 in words is "one billion, two hundred forty-five million, five hundred thirteen thousand, forty".