1222167406 has 4 divisors (see below), whose sum is σ = 1833251112. Its totient is φ = 611083702.

The previous prime is 1222167379. The next prime is 1222167407. The reversal of 1222167406 is 6047612221.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222167407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305541850 + ... + 305541853.

It is an arithmetic number, because the mean of its divisors is an integer number (458312778).

Almost surely, 2^1222167406 is an apocalyptic number.

1222167406 is a deficient number, since it is larger than the sum of its proper divisors (611083706).

1222167406 is an equidigital number, since it uses as much as digits as its factorization.

1222167406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611083705.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 1222167406 is about 34959.5109519570. The cubic root of 1222167406 is about 1069.1621256765.

Adding to 1222167406 its reverse (6047612221), we get a palindrome (7269779627).

The spelling of 1222167406 in words is "one billion, two hundred twenty-two million, one hundred sixty-seven thousand, four hundred six".