1272240852 has 12 divisors (see below), whose sum is σ = 2968562016. Its totient is φ = 424080280.

The previous prime is 1272240811. The next prime is 1272240857. The reversal of 1272240852 is 2580422721.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272240857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53010024 + ... + 53010047.

It is an arithmetic number, because the mean of its divisors is an integer number (247380168).

Almost surely, 2^1272240852 is an apocalyptic number.

1272240852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1272240852 is an abundant number, since it is smaller than the sum of its proper divisors (1696321164).

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

1272240852 is a wasteful number, since it uses less digits than its factorization.

1272240852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106020078 (or 106020076 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 1272240852 is about 35668.4854178026. The cubic root of 1272240852 is about 1083.5686852663.

The spelling of 1272240852 in words is "one billion, two hundred seventy-two million, two hundred forty thousand, eight hundred fifty-two".