10561540 has 48 divisors (see below), whose sum is σ = 24623424. Its totient is φ = 3772800.

The previous prime is 10561519. The next prime is 10561543. The reversal of 10561540 is 4516501.

It is a super-2 number, since 2×10561540² = 223092254343200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (10561543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13027 + ... + 13813.

It is an arithmetic number, because the mean of its divisors is an integer number (512988).

Almost surely, 2^10561540 is an apocalyptic number.

10561540 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 10561540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12311712).

10561540 is an abundant number, since it is smaller than the sum of its proper divisors (14061884).

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

10561540 is a wasteful number, since it uses less digits than its factorization.

10561540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 10561540 is about 3249.8523043363. The cubic root of 10561540 is about 219.4029264805.

The spelling of 10561540 in words is "ten million, five hundred sixty-one thousand, five hundred forty".