11142521 has 8 divisors (see below), whose sum is σ = 12048960. Its totient is φ = 10243152.

The previous prime is 11142491. The next prime is 11142539. The reversal of 11142521 is 12524111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11142521 - 2⁶ = 11142457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11142521.

It is not an unprimeable number, because it can be changed into a prime (11142581) 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 7 ways as a sum of consecutive naturals, for example, 1790 + ... + 5048.

It is an arithmetic number, because the mean of its divisors is an integer number (1506120).

Almost surely, 2^11142521 is an apocalyptic number.

It is an amenable number.

11142521 is a deficient number, since it is larger than the sum of its proper divisors (906439).

11142521 is a wasteful number, since it uses less digits than its factorization.

11142521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3535.

The product of its digits is 80, while the sum is 17.

The square root of 11142521 is about 3338.0414916535. The cubic root of 11142521 is about 223.3543870155.

Adding to 11142521 its reverse (12524111), we get a palindrome (23666632).

The spelling of 11142521 in words is "eleven million, one hundred forty-two thousand, five hundred twenty-one".