1061521500 has 96 divisors (see below), whose sum is σ = 3328992576. Its totient is φ = 261292800.

The previous prime is 1061521493. The next prime is 1061521519. The reversal of 1061521500 is 51251601.

1061521500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1061521500² = 2253655789924500000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7719 + ... + 46718.

It is an arithmetic number, because the mean of its divisors is an integer number (34677006).

Almost surely, 2^1061521500 is an apocalyptic number.

1061521500 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 1061521500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1664496288).

1061521500 is an abundant number, since it is smaller than the sum of its proper divisors (2267471076).

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

1061521500 is a wasteful number, since it uses less digits than its factorization.

1061521500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54472 (or 54460 counting only the distinct ones).

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

The square root of 1061521500 is about 32580.9990638716. Note that the first 3 decimals coincide. The cubic root of 1061521500 is about 1020.1004322485.

The spelling of 1061521500 in words is "one billion, sixty-one million, five hundred twenty-one thousand, five hundred".