1012156272 has 60 divisors (see below), whose sum is σ = 2849661360. Its totient is φ = 335357184.

The previous prime is 1012156213. The next prime is 1012156283. The reversal of 1012156272 is 2726512101.

1012156272 is a `hidden beast` number, since 10 + 1 + 21 + 5 + 627 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3004 + ... + 45092.

It is an arithmetic number, because the mean of its divisors is an integer number (47494356).

Almost surely, 2^1012156272 is an apocalyptic number.

1012156272 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 1012156272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1424830680).

1012156272 is an abundant number, since it is smaller than the sum of its proper divisors (1837505088).

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

1012156272 is a wasteful number, since it uses less digits than its factorization.

1012156272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42270 (or 42261 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 1012156272 is about 31814.4035304766. The cubic root of 1012156272 is about 1004.0357812256.

Adding to 1012156272 its reverse (2726512101), we get a palindrome (3738668373).

The spelling of 1012156272 in words is "one billion, twelve million, one hundred fifty-six thousand, two hundred seventy-two".