11154421 has 2 divisors, whose sum is σ = 11154422. Its totient is φ = 11154420.

The previous prime is 11154413. The next prime is 11154443. The reversal of 11154421 is 12445111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8468100 + 2686321 = 2910^2 + 1639^2 .

It is a cyclic number.

It is not a de Polignac number, because 11154421 - 2³ = 11154413 is a prime.

It is a super-2 number, since 2×11154421² = 248842215690482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11154401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5577210 + 5577211.

It is an arithmetic number, because the mean of its divisors is an integer number (5577211).

Almost surely, 2^11154421 is an apocalyptic number.

It is an amenable number.

11154421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11154421 is an equidigital number, since it uses as much as digits as its factorization.

11154421 is an evil number, because the sum of its binary digits is even.

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

The square root of 11154421 is about 3339.8234983304. The cubic root of 11154421 is about 223.4338714686.

Adding to 11154421 its reverse (12445111), we get a palindrome (23599532).

The spelling of 11154421 in words is "eleven million, one hundred fifty-four thousand, four hundred twenty-one".