1245522680 has 128 divisors (see below), whose sum is σ = 3132017280. Its totient is φ = 443351040.

The previous prime is 1245522679. The next prime is 1245522763. The reversal of 1245522680 is 862255421.

It is a self number, because there is not a number n which added to its sum of digits gives 1245522680.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1516670 + ... + 1517490.

It is an arithmetic number, because the mean of its divisors is an integer number (24468885).

Almost surely, 2^1245522680 is an apocalyptic number.

1245522680 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 1245522680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1566008640).

1245522680 is an abundant number, since it is smaller than the sum of its proper divisors (1886494600).

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

1245522680 is a wasteful number, since it uses less digits than its factorization.

1245522680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969 (or 965 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 1245522680 is about 35291.9633911178. The cubic root of 1245522680 is about 1075.9296605530.

The spelling of 1245522680 in words is "one billion, two hundred forty-five million, five hundred twenty-two thousand, six hundred eighty".