1242441720 has 128 divisors (see below), whose sum is σ = 4460097600. Its totient is φ = 305828352.

The previous prime is 1242441679. The next prime is 1242441721. The reversal of 1242441720 is 271442421.

1242441720 is a `hidden beast` number, since 1 + 242 + 4 + 417 + 2 + 0 = 666.

It is a super-2 number, since 2×1242441720² = 3087322855193116800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242441721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30207 + ... + 58286.

Almost surely, 2^1242441720 is an apocalyptic number.

1242441720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242441720 is an abundant number, since it is smaller than the sum of its proper divisors (3217655880).

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

1242441720 is a wasteful number, since it uses less digits than its factorization.

1242441720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88526 (or 88516 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 1242441720 is about 35248.2867668771. The cubic root of 1242441720 is about 1075.0417780771.

The spelling of 1242441720 in words is "one billion, two hundred forty-two million, four hundred forty-one thousand, seven hundred twenty".