1242728560 has 40 divisors (see below), whose sum is σ = 3059308656. Its totient is φ = 467850240.

The previous prime is 1242728537. The next prime is 1242728569. The reversal of 1242728560 is 658272421.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242728569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455526 + ... + 458245.

Almost surely, 2^1242728560 is an apocalyptic number.

1242728560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242728560 is an abundant number, since it is smaller than the sum of its proper divisors (1816580096).

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

1242728560 is a wasteful number, since it uses less digits than its factorization.

1242728560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913801 (or 913795 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 1242728560 is about 35252.3553823003. The cubic root of 1242728560 is about 1075.1245026162.

The spelling of 1242728560 in words is "one billion, two hundred forty-two million, seven hundred twenty-eight thousand, five hundred sixty".