11172540 has 48 divisors (see below), whose sum is σ = 32366880. Its totient is φ = 2876160.

The previous prime is 11172529. The next prime is 11172593. The reversal of 11172540 is 4527111.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1471 + ... + 4950.

It is an arithmetic number, because the mean of its divisors is an integer number (674310).

Almost surely, 2^11172540 is an apocalyptic number.

11172540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11172540 is an abundant number, since it is smaller than the sum of its proper divisors (21194340).

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

11172540 is a wasteful number, since it uses less digits than its factorization.

11172540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6462 (or 6460 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 11172540 is about 3342.5349661597. The cubic root of 11172540 is about 223.5547864030.

Adding to 11172540 its reverse (4527111), we get a palindrome (15699651).

The spelling of 11172540 in words is "eleven million, one hundred seventy-two thousand, five hundred forty".