1242140928 has 72 divisors (see below), whose sum is σ = 3778195008. Its totient is φ = 354895872.

The previous prime is 1242140923. The next prime is 1242140929. The reversal of 1242140928 is 8290412421.

It is not an unprimeable number, because it can be changed into a prime (1242140923) 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, 110151 + ... + 120902.

Almost surely, 2^1242140928 is an apocalyptic number.

It is an amenable number.

1242140928 is an abundant number, since it is smaller than the sum of its proper divisors (2536054080).

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

1242140928 is an equidigital number, since it uses as much as digits as its factorization.

1242140928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231079 (or 231065 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 1242140928 is about 35244.0197480367. The cubic root of 1242140928 is about 1074.9550161094.

The spelling of 1242140928 in words is "one billion, two hundred forty-two million, one hundred forty thousand, nine hundred twenty-eight".