1222138 has 4 divisors (see below), whose sum is σ = 1833210. Its totient is φ = 611068.

The previous prime is 1222129. The next prime is 1222157. The reversal of 1222138 is 8312221.

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

It can be written as a sum of positive squares in only one way, i.e., 870489 + 351649 = 933^2 + 593^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305533 + ... + 305536.

2^1222138 is an apocalyptic number.

1222138 is a deficient number, since it is larger than the sum of its proper divisors (611072).

1222138 is an equidigital number, since it uses as much as digits as its factorization.

1222138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611071.

The product of its digits is 192, while the sum is 19.

The square root of 1222138 is about 1105.5035051957. The cubic root of 1222138 is about 106.9153550737.

Adding to 1222138 its reverse (8312221), we get a palindrome (9534359).

It can be divided in two parts, 122213 and 8, that added together give a palindrome (122221).

The spelling of 1222138 in words is "one million, two hundred twenty-two thousand, one hundred thirty-eight".