1242655744 has 44 divisors (see below), whose sum is σ = 2709949608. Its totient is φ = 564838400.

The previous prime is 1242655723. The next prime is 1242655747. The reversal of 1242655744 is 4475562421.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (44).

It is a junction number, because it is equal to n+sod(n) for n = 1242655697 and 1242655706.

It is not an unprimeable number, because it can be changed into a prime (1242655747) 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, 43897 + ... + 66424.

Almost surely, 2^1242655744 is an apocalyptic number.

It is an amenable number.

1242655744 is an abundant number, since it is smaller than the sum of its proper divisors (1467293864).

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

1242655744 is a wasteful number, since it uses less digits than its factorization.

1242655744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110352 (or 110334 counting only the distinct ones).

The product of its digits is 268800, while the sum is 40.

The square root of 1242655744 is about 35251.3225851173. The cubic root of 1242655744 is about 1075.1035037172.

The spelling of 1242655744 in words is "one billion, two hundred forty-two million, six hundred fifty-five thousand, seven hundred forty-four".