1113421 has 2 divisors, whose sum is σ = 1113422. Its totient is φ = 1113420.

The previous prime is 1113403. The next prime is 1113451. The reversal of 1113421 is 1243111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 741321 + 372100 = 861^2 + 610^2 .

It is an emirp because it is prime and its reverse (1243111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1113421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1113401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556710 + 556711.

It is an arithmetic number, because the mean of its divisors is an integer number (556711).

2^1113421 is an apocalyptic number.

It is an amenable number.

1113421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113421 is an equidigital number, since it uses as much as digits as its factorization.

1113421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24, while the sum is 13.

The square root of 1113421 is about 1055.1876610348. The cubic root of 1113421 is about 103.6461408042.

Adding to 1113421 its reverse (1243111), we get a palindrome (2356532).

The spelling of 1113421 in words is "one million, one hundred thirteen thousand, four hundred twenty-one".