1242291928 has 16 divisors (see below), whose sum is σ = 2346057000. Its totient is φ = 616676736.

The previous prime is 1242291917. The next prime is 1242291929. The reversal of 1242291928 is 8291922421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242291929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 557473 + ... + 559696.

Almost surely, 2^1242291928 is an apocalyptic number.

It is an amenable number.

1242291928 is a deficient number, since it is larger than the sum of its proper divisors (1103765072).

1242291928 is a wasteful number, since it uses less digits than its factorization.

1242291928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117314 (or 1117310 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 1242291928 is about 35246.1618903392. The cubic root of 1242291928 is about 1074.9985730646.

The spelling of 1242291928 in words is "one billion, two hundred forty-two million, two hundred ninety-one thousand, nine hundred twenty-eight".