1272561233532 has 384 divisors, whose sum is σ = 3419996160000. Its totient is φ = 366159087360.

The previous prime is 1272561233527. The next prime is 1272561233543. The reversal of 1272561233532 is 2353321652721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4496682663 + ... + 4496682945.

It is an arithmetic number, because the mean of its divisors is an integer number (8906240000).

Almost surely, 2^{1272561233532} is an apocalyptic number.

1272561233532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1272561233532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1709998080000).

1272561233532 is an abundant number, since it is smaller than the sum of its proper divisors (2147434926468).

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

1272561233532 is a wasteful number, since it uses less digits than its factorization.

1272561233532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701 (or 699 counting only the distinct ones).

The product of its digits is 453600, while the sum is 42.

The spelling of 1272561233532 in words is "one trillion, two hundred seventy-two billion, five hundred sixty-one million, two hundred thirty-three thousand, five hundred thirty-two".