10515240 has 48 divisors (see below), whose sum is σ = 34175700. Its totient is φ = 2803968.

The previous prime is 10515233. The next prime is 10515247. The reversal of 10515240 is 4251501.

It is an interprime number because it is at equal distance from previous prime (10515233) and next prime (10515247).

It can be written as a sum of positive squares in 2 ways, for example, as 10381284 + 133956 = 3222^2 + 366^2 .

It is a super-2 number, since 2×10515240² = 221140544515200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (10515247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14245 + ... + 14964.

Almost surely, 2^10515240 is an apocalyptic number.

10515240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10515240 is an abundant number, since it is smaller than the sum of its proper divisors (23660460).

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

10515240 is a wasteful number, since it uses less digits than its factorization.

10515240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29226 (or 29219 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 10515240 is about 3242.7210795873. The cubic root of 10515240 is about 219.0818484331.

Adding to 10515240 its reverse (4251501), we get a palindrome (14766741).

The spelling of 10515240 in words is "ten million, five hundred fifteen thousand, two hundred forty".