1249057560 has 64 divisors (see below), whose sum is σ = 3799975680. Its totient is φ = 328388480.

The previous prime is 1249057517. The next prime is 1249057561. The reversal of 1249057560 is 657509421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249057561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64782 + ... + 81821.

It is an arithmetic number, because the mean of its divisors is an integer number (59374620).

Almost surely, 2^1249057560 is an apocalyptic number.

1249057560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1249057560 is an abundant number, since it is smaller than the sum of its proper divisors (2550918120).

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

1249057560 is a wasteful number, since it uses less digits than its factorization.

1249057560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146688 (or 146684 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 1249057560 is about 35342.0084318931. The cubic root of 1249057560 is about 1076.9465535594.

The spelling of 1249057560 in words is "one billion, two hundred forty-nine million, fifty-seven thousand, five hundred sixty".