11145421 has 16 divisors (see below), whose sum is σ = 13682304. Its totient is φ = 8861184.

The previous prime is 11145401. The next prime is 11145443. The reversal of 11145421 is 12454111.

It is a cyclic number.

It is not a de Polignac number, because 11145421 - 2¹⁵ = 11112653 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 (11145401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8046 + ... + 9328.

It is an arithmetic number, because the mean of its divisors is an integer number (855144).

Almost surely, 2^11145421 is an apocalyptic number.

It is an amenable number.

11145421 is a deficient number, since it is larger than the sum of its proper divisors (2536883).

11145421 is a wasteful number, since it uses less digits than its factorization.

11145421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380.

The product of its digits is 160, while the sum is 19.

The square root of 11145421 is about 3338.4758498453. The cubic root of 11145421 is about 223.3737623895.

Adding to 11145421 its reverse (12454111), we get a palindrome (23599532).

The spelling of 11145421 in words is "eleven million, one hundred forty-five thousand, four hundred twenty-one".