11576421 has 6 divisors (see below), whose sum is σ = 16721510. Its totient is φ = 7717608.

The previous prime is 11576407. The next prime is 11576447. The reversal of 11576421 is 12467511.

It is a happy number.

11576421 is a `hidden beast` number, since 1 + 15 + 7 + 642 + 1 = 666.

11576421 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in only one way, i.e., 9235521 + 2340900 = 3039^2 + 1530^2 .

It is not a de Polignac number, because 11576421 - 2⁷ = 11576293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11576401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 643126 + ... + 643143.

Almost surely, 2^11576421 is an apocalyptic number.

It is an amenable number.

11576421 is a deficient number, since it is larger than the sum of its proper divisors (5145089).

11576421 is a wasteful number, since it uses less digits than its factorization.

11576421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286275 (or 1286272 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 11576421 is about 3402.4139959740. The cubic root of 11576421 is about 226.2167563053.

The spelling of 11576421 in words is "eleven million, five hundred seventy-six thousand, four hundred twenty-one".