1406221406 has 4 divisors (see below), whose sum is σ = 2109332112. Its totient is φ = 703110702.

The previous prime is 1406221379. The next prime is 1406221417. The reversal of 1406221406 is 6041226041.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 351555350 + ... + 351555353.

It is an arithmetic number, because the mean of its divisors is an integer number (527333028).

Almost surely, 2^1406221406 is an apocalyptic number.

1406221406 is a deficient number, since it is larger than the sum of its proper divisors (703110706).

1406221406 is an equidigital number, since it uses as much as digits as its factorization.

1406221406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703110705.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 1406221406 is about 37499.6187447286. The cubic root of 1406221406 is about 1120.3435930301.

Adding to 1406221406 its reverse (6041226041), we get a palindrome (7447447447).

The spelling of 1406221406 in words is "one billion, four hundred six million, two hundred twenty-one thousand, four hundred six".