1242526728 has 32 divisors (see below), whose sum is σ = 3107289600. Its totient is φ = 414045888.

The previous prime is 1242526697. The next prime is 1242526729. The reversal of 1242526728 is 8276252421.

It is not an unprimeable number, because it can be changed into a prime (1242526729) 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, 99033 + ... + 110871.

It is an arithmetic number, because the mean of its divisors is an integer number (97102800).

Almost surely, 2^1242526728 is an apocalyptic number.

It is an amenable number.

1242526728 is an abundant number, since it is smaller than the sum of its proper divisors (1864762872).

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

1242526728 is a wasteful number, since it uses less digits than its factorization.

1242526728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16221 (or 16217 counting only the distinct ones).

The product of its digits is 107520, while the sum is 39.

The square root of 1242526728 is about 35249.4925920927. The cubic root of 1242526728 is about 1075.0662956771.

The spelling of 1242526728 in words is "one billion, two hundred forty-two million, five hundred twenty-six thousand, seven hundred twenty-eight".