1285951230072 has 160 divisors (see below), whose sum is σ = 3830515827600. Its totient is φ = 401902995456.

The previous prime is 1285951230071. The next prime is 1285951230197. The reversal of 1285951230072 is 2700321595821.

1285951230072 is a `hidden beast` number, since 1 + 28 + 595 + 1 + 2 + 30 + 0 + 7 + 2 = 666.

It is a super-2 number, since 2×1285951230072² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285951230071) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 655878 + ... + 1732650.

Almost surely, 2^{1285951230072} is an apocalyptic number.

1285951230072 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 1285951230072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1915257913800).

1285951230072 is an abundant number, since it is smaller than the sum of its proper divisors (2544564597528).

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

1285951230072 is a wasteful number, since it uses less digits than its factorization.

1285951230072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076907 (or 1076894 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 1285951230072 in words is "one trillion, two hundred eighty-five billion, nine hundred fifty-one million, two hundred thirty thousand, seventy-two".