1406221 has 2 divisors, whose sum is σ = 1406222. Its totient is φ = 1406220.

The previous prime is 1406213. The next prime is 1406231. The reversal of 1406221 is 1226041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1297321 + 108900 = 1139^2 + 330^2 .

It is an emirp because it is prime and its reverse (1226041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1406221 - 2³ = 1406213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1406195 and 1406204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1406231) 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, 703110 + 703111.

It is an arithmetic number, because the mean of its divisors is an integer number (703111).

2^1406221 is an apocalyptic number.

It is an amenable number.

1406221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406221 is an equidigital number, since it uses as much as digits as its factorization.

1406221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1406221 is about 1185.8418950265. The cubic root of 1406221 is about 112.0343485209.

The spelling of 1406221 in words is "one million, four hundred six thousand, two hundred twenty-one".