1242904600 has 72 divisors (see below), whose sum is σ = 3361576140. Its totient is φ = 426135360.

The previous prime is 1242904577. The next prime is 1242904601. The reversal of 1242904600 is 64092421.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242904601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 53614 + ... + 73213.

Almost surely, 2^1242904600 is an apocalyptic number.

1242904600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242904600 is an abundant number, since it is smaller than the sum of its proper divisors (2118671540).

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

1242904600 is a wasteful number, since it uses less digits than its factorization.

1242904600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126857 (or 126841 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1242904600 is about 35254.8521483214. The cubic root of 1242904600 is about 1075.1752661773.

The spelling of 1242904600 in words is "one billion, two hundred forty-two million, nine hundred four thousand, six hundred".