11257543 has 4 divisors (see below), whose sum is σ = 12280968. Its totient is φ = 10234120.

The previous prime is 11257537. The next prime is 11257573. The reversal of 11257543 is 34575211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11257543 - 2⁹ = 11257031 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 (11257573) 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, 511696 + ... + 511717.

It is an arithmetic number, because the mean of its divisors is an integer number (3070242).

Almost surely, 2^11257543 is an apocalyptic number.

11257543 is a deficient number, since it is larger than the sum of its proper divisors (1023425).

11257543 is a wasteful number, since it uses less digits than its factorization.

11257543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023424.

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

The square root of 11257543 is about 3355.2262218813. The cubic root of 11257543 is about 224.1203050077.

It can be divided in two parts, 1125 and 7543, that added together give a palindrome (8668).

The spelling of 11257543 in words is "eleven million, two hundred fifty-seven thousand, five hundred forty-three".