1242765580 has 48 divisors (see below), whose sum is σ = 3027177216. Its totient is φ = 419728320.

The previous prime is 1242765577. The next prime is 1242765581. The reversal of 1242765580 is 855672421.

It is a super-4 number, since 4×1242765580⁴ (a number of 37 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (1242765581) 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 15 ways as a sum of consecutive naturals, for example, 56866 + ... + 75625.

It is an arithmetic number, because the mean of its divisors is an integer number (63066192).

Almost surely, 2^1242765580 is an apocalyptic number.

1242765580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242765580 is an abundant number, since it is smaller than the sum of its proper divisors (1784411636).

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

1242765580 is a wasteful number, since it uses less digits than its factorization.

1242765580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132574 (or 132572 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 1242765580 is about 35252.8804496881. The cubic root of 1242765580 is about 1075.1351782417.

The spelling of 1242765580 in words is "one billion, two hundred forty-two million, seven hundred sixty-five thousand, five hundred eighty".