10015540 has 12 divisors (see below), whose sum is σ = 21032676. Its totient is φ = 4006208.

The previous prime is 10015519. The next prime is 10015553. The reversal of 10015540 is 4551001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2298256 + 7717284 = 1516^2 + 2778^2 .

It is a super-2 number, since 2×10015540² = 200622082983200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250369 + ... + 250408.

It is an arithmetic number, because the mean of its divisors is an integer number (1752723).

Almost surely, 2^10015540 is an apocalyptic number.

10015540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10015540 is an abundant number, since it is smaller than the sum of its proper divisors (11017136).

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

10015540 is a wasteful number, since it uses less digits than its factorization.

10015540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500786 (or 500784 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 10015540 is about 3164.7337960720. The cubic root of 10015540 is about 215.5550109613. Note that the first 3 decimals are identical.

Adding to 10015540 its reverse (4551001), we get a palindrome (14566541).

The spelling of 10015540 in words is "ten million, fifteen thousand, five hundred forty".