11534721 has 32 divisors (see below), whose sum is σ = 18403200. Its totient is φ = 6343680.

The previous prime is 11534717. The next prime is 11534723. The reversal of 11534721 is 12743511.

It is not a de Polignac number, because 11534721 - 2² = 11534717 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11534691 and 11534700.

It is not an unprimeable number, because it can be changed into a prime (11534723) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15915 + ... + 16623.

It is an arithmetic number, because the mean of its divisors is an integer number (575100).

Almost surely, 2^11534721 is an apocalyptic number.

11534721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11534721 is a deficient number, since it is larger than the sum of its proper divisors (6868479).

11534721 is a wasteful number, since it uses less digits than its factorization.

11534721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769.

The product of its digits is 840, while the sum is 24.

The square root of 11534721 is about 3396.2804654504. The cubic root of 11534721 is about 225.9448073121.

The spelling of 11534721 in words is "eleven million, five hundred thirty-four thousand, seven hundred twenty-one".