1001215272 has 64 divisors (see below), whose sum is σ = 2655158400. Its totient is φ = 313528320.

The previous prime is 1001215261. The next prime is 1001215307. The reversal of 1001215272 is 2725121001.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255504 + ... + 259392.

It is an arithmetic number, because the mean of its divisors is an integer number (41486850).

Almost surely, 2^1001215272 is an apocalyptic number.

1001215272 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 1001215272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1327579200).

1001215272 is an abundant number, since it is smaller than the sum of its proper divisors (1653943128).

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

1001215272 is a wasteful number, since it uses less digits than its factorization.

1001215272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4546 (or 4542 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 1001215272 is about 31641.9859048069. The cubic root of 1001215272 is about 1000.4049266789.

Adding to 1001215272 its reverse (2725121001), we get a palindrome (3726336273).

The spelling of 1001215272 in words is "one billion, one million, two hundred fifteen thousand, two hundred seventy-two".