1220312 has 8 divisors (see below), whose sum is σ = 2288100. Its totient is φ = 610152.

The previous prime is 1220309. The next prime is 1220327. The reversal of 1220312 is 2130221.

It is a happy number.

1220312 is nontrivially palindromic in base 3.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1220312² = 2978322754688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220293 and 1220302.

It is a congruent number.

It is an unprimeable number.

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, 76262 + ... + 76277.

2^1220312 is an apocalyptic number.

It is an amenable number.

1220312 is a deficient number, since it is larger than the sum of its proper divisors (1067788).

1220312 is a wasteful number, since it uses less digits than its factorization.

1220312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152545 (or 152541 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1220312 is about 1104.6773284539. The cubic root of 1220312 is about 106.8620810165.

Adding to 1220312 its reverse (2130221), we get a palindrome (3350533).

Subtracting 1220312 from its reverse (2130221), we obtain a palindrome (909909).

The spelling of 1220312 in words is "one million, two hundred twenty thousand, three hundred twelve".