1215126754751 has 24 divisors (see below), whose sum is σ = 1524418799904. Its totient is φ = 960047121600.

The previous prime is 1215126754747. The next prime is 1215126754763. The reversal of 1215126754751 is 1574576215121.

It is not a de Polignac number, because 1215126754751 - 2² = 1215126754747 is a prime.

It is a super-2 number, since 2×1215126754751² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1215126754696 and 1215126754705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215126754741) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 914075 + ... + 1807148.

It is an arithmetic number, because the mean of its divisors is an integer number (63517449996).

Almost surely, 2^{1215126754751} is an apocalyptic number.

1215126754751 is a deficient number, since it is larger than the sum of its proper divisors (309292045153).

1215126754751 is a wasteful number, since it uses less digits than its factorization.

1215126754751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721951 (or 2721944 counting only the distinct ones).

The product of its digits is 588000, while the sum is 47.

The spelling of 1215126754751 in words is "one trillion, two hundred fifteen billion, one hundred twenty-six million, seven hundred fifty-four thousand, seven hundred fifty-one".