11478121 has 4 divisors (see below), whose sum is σ = 11536000. Its totient is φ = 11420244.

The previous prime is 11478101. The next prime is 11478143. The reversal of 11478121 is 12187411.

11478121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12187411 = 569 ⋅21419.

It is a cyclic number.

It is not a de Polignac number, because 11478121 - 2⁷ = 11477993 is a prime.

It is a super-3 number, since 3×11478121³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11478101) 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, 28641 + ... + 29038.

It is an arithmetic number, because the mean of its divisors is an integer number (2884000).

Almost surely, 2^11478121 is an apocalyptic number.

It is an amenable number.

11478121 is a deficient number, since it is larger than the sum of its proper divisors (57879).

11478121 is an equidigital number, since it uses as much as digits as its factorization.

11478121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57878.

The product of its digits is 448, while the sum is 25.

The square root of 11478121 is about 3387.9375732147. The cubic root of 11478121 is about 225.5746365132.

The spelling of 11478121 in words is "eleven million, four hundred seventy-eight thousand, one hundred twenty-one".