11723115 has 32 divisors (see below), whose sum is σ = 20514816. Its totient is φ = 5690880.

The previous prime is 11723113. The next prime is 11723119. The reversal of 11723115 is 51132711.

It is a happy number.

It is not a de Polignac number, because 11723115 - 2¹ = 11723113 is a prime.

It is a super-3 number, since 3×11723115³ (a number of 22 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11723091 and 11723100.

It is not an unprimeable number, because it can be changed into a prime (11723111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7164 + ... + 8646.

It is an arithmetic number, because the mean of its divisors is an integer number (641088).

Almost surely, 2^11723115 is an apocalyptic number.

11723115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11723115 is a deficient number, since it is larger than the sum of its proper divisors (8791701).

11723115 is a wasteful number, since it uses less digits than its factorization.

11723115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539.

The product of its digits is 210, while the sum is 21.

The square root of 11723115 is about 3423.9034741067. The cubic root of 11723115 is about 227.1682723148.

Adding to 11723115 its reverse (51132711), we get a palindrome (62855826).

It can be divided in two parts, 117 and 23115, that added together give a palindrome (23232).

The spelling of 11723115 in words is "eleven million, seven hundred twenty-three thousand, one hundred fifteen".