1101421 has 2 divisors, whose sum is σ = 1101422. Its totient is φ = 1101420.

The previous prime is 1101409. The next prime is 1101431. The reversal of 1101421 is 1241011.

It is an a-pointer prime, because the next prime (1101431) can be obtained adding 1101421 to its sum of digits (10).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 837225 + 264196 = 915^2 + 514^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101421 - 2⁵ = 1101389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1101398 and 1101407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550710 + 550711.

It is an arithmetic number, because the mean of its divisors is an integer number (550711).

2^1101421 is an apocalyptic number.

It is an amenable number.

1101421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101421 is an equidigital number, since it uses as much as digits as its factorization.

1101421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1101421 is about 1049.4860647002. The cubic root of 1101421 is about 103.2724430261.

Adding to 1101421 its reverse (1241011), we get a palindrome (2342432).

The spelling of 1101421 in words is "one million, one hundred one thousand, four hundred twenty-one".