11543257 has 4 divisors (see below), whose sum is σ = 12592656. Its totient is φ = 10493860.

The previous prime is 11543249. The next prime is 11543269. The reversal of 11543257 is 75234511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11543257 - 2³ = 11543249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11543227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524683 + ... + 524704.

It is an arithmetic number, because the mean of its divisors is an integer number (3148164).

Almost surely, 2^11543257 is an apocalyptic number.

It is an amenable number.

11543257 is a deficient number, since it is larger than the sum of its proper divisors (1049399).

11543257 is a wasteful number, since it uses less digits than its factorization.

11543257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049398.

The product of its digits is 4200, while the sum is 28.

The square root of 11543257 is about 3397.5369019335. The cubic root of 11543257 is about 226.0005286228. Note that the first 3 decimals are identical.

Adding to 11543257 its reverse (75234511), we get a palindrome (86777768).

The spelling of 11543257 in words is "eleven million, five hundred forty-three thousand, two hundred fifty-seven".