1001521560 has 128 divisors (see below), whose sum is σ = 3245780160. Its totient is φ = 245760000.

The previous prime is 1001521541. The next prime is 1001521571. The reversal of 1001521560 is 651251001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 624760 + ... + 626360.

Almost surely, 2^1001521560 is an apocalyptic number.

1001521560 is a gapful number since it is divisible by the number (10) 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 1001521560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1622890080).

1001521560 is an abundant number, since it is smaller than the sum of its proper divisors (2244258600).

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

1001521560 is a wasteful number, since it uses less digits than its factorization.

1001521560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029 (or 2025 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1001521560 is about 31646.8254332089. The cubic root of 1001521560 is about 1000.5069296456.

Adding to 1001521560 its reverse (651251001), we get a palindrome (1652772561).

The spelling of 1001521560 in words is "one billion, one million, five hundred twenty-one thousand, five hundred sixty".