11142557 has 4 divisors (see below), whose sum is σ = 11627040. Its totient is φ = 10658076.

The previous prime is 11142553. The next prime is 11142581. The reversal of 11142557 is 75524111.

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 11142557 - 2² = 11142553 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 (11142553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242207 + ... + 242252.

It is an arithmetic number, because the mean of its divisors is an integer number (2906760).

Almost surely, 2^11142557 is an apocalyptic number.

It is an amenable number.

11142557 is a deficient number, since it is larger than the sum of its proper divisors (484483).

11142557 is an equidigital number, since it uses as much as digits as its factorization.

11142557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484482.

The product of its digits is 1400, while the sum is 26.

The square root of 11142557 is about 3338.0468840326. The cubic root of 11142557 is about 223.3546275580.

Adding to 11142557 its reverse (75524111), we get a palindrome (86666668).

The spelling of 11142557 in words is "eleven million, one hundred forty-two thousand, five hundred fifty-seven".