11142421 has 4 divisors (see below), whose sum is σ = 11252844. Its totient is φ = 11032000.

The previous prime is 11142413. The next prime is 11142427. The reversal of 11142421 is 12424111.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9678321 + 1464100 = 3111^2 + 1210^2 .

It is a cyclic number.

It is not a de Polignac number, because 11142421 - 2³ = 11142413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11142395 and 11142404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11142427) 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, 55060 + ... + 55261.

It is an arithmetic number, because the mean of its divisors is an integer number (2813211).

Almost surely, 2^11142421 is an apocalyptic number.

It is an amenable number.

11142421 is a deficient number, since it is larger than the sum of its proper divisors (110423).

11142421 is a wasteful number, since it uses less digits than its factorization.

11142421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110422.

The product of its digits is 64, while the sum is 16.

The square root of 11142421 is about 3338.0265127767. The cubic root of 11142421 is about 223.3537188392.

Adding to 11142421 its reverse (12424111), we get a palindrome (23566532).

The spelling of 11142421 in words is "eleven million, one hundred forty-two thousand, four hundred twenty-one".