1221412 has 6 divisors (see below), whose sum is σ = 2137478.
Its totient is φ = 610704.
The previous prime is 1221391. The next prime is 1221421. The reversal of 1221412 is 2141221.
It is a happy number.
It can be written as a sum of positive squares in only one way, i.e., 1115136 + 106276 = 1056^2 + 326^2
It is a nude number because it is divisible by every one of its digits.
It is an Ulam number.
It is a junction number, because it is equal to n+sod(n) for n = 1221392 and 1221401.
It is an unprimeable number.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152673 + ... + 152680.
21221412 is an apocalyptic number.
It is an amenable number.
1221412 is a deficient number, since it is larger than the sum of its proper divisors (916066).
1221412 is a wasteful number, since it uses less digits than its factorization.
1221412 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 305357 (or 305355 counting only the distinct ones).
The product of its digits is 32, while the sum is 13.
The square root of 1221412 is about 1105.1750992490.
The cubic root of 1221412 is about 106.8941801811.
Adding to 1221412 its reverse (2141221), we get a palindrome (3362633).
The spelling of 1221412 in words is "one million, two hundred twenty-one thousand, four hundred twelve".