11298421 has 4 divisors (see below), whose sum is σ = 11963052. Its totient is φ = 10633792.

The previous prime is 11298409. The next prime is 11298433. The reversal of 11298421 is 12489211.

11298421 = T₂₇₄₃ + T₂₇₄₄ + T₂₇₄₅.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12489211 = 7 ⋅1784173.

It is an interprime number because it is at equal distance from previous prime (11298409) and next prime (11298433).

It can be written as a sum of positive squares in 2 ways, for example, as 3845521 + 7452900 = 1961^2 + 2730^2 .

It is a cyclic number.

It is not a de Polignac number, because 11298421 - 2⁵ = 11298389 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 11298421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11293421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332290 + ... + 332323.

It is an arithmetic number, because the mean of its divisors is an integer number (2990763).

Almost surely, 2^11298421 is an apocalyptic number.

11298421 is the 2745-th centered triangular number.

It is an amenable number.

11298421 is a deficient number, since it is larger than the sum of its proper divisors (664631).

11298421 is an equidigital number, since it uses as much as digits as its factorization.

11298421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664630.

The product of its digits is 1152, while the sum is 28.

The square root of 11298421 is about 3361.3123925039. The cubic root of 11298421 is about 224.3912499514.

The spelling of 11298421 in words is "eleven million, two hundred ninety-eight thousand, four hundred twenty-one".