1221467 has 8 divisors (see below), whose sum is σ = 1393056. Its totient is φ = 1060992.

The previous prime is 1221463. The next prime is 1221469. The reversal of 1221467 is 7641221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221467 - 2² = 1221463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221463) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 2543 + ... + 2984.

It is an arithmetic number, because the mean of its divisors is an integer number (174132).

2^1221467 is an apocalyptic number.

1221467 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1221467 is a deficient number, since it is larger than the sum of its proper divisors (171589).

1221467 is a wasteful number, since it uses less digits than its factorization.

1221467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5557.

The product of its digits is 672, while the sum is 23.

The square root of 1221467 is about 1105.1999819037. The cubic root of 1221467 is about 106.8957846333.

Adding to 1221467 its reverse (7641221), we get a palindrome (8862688).

The spelling of 1221467 in words is "one million, two hundred twenty-one thousand, four hundred sixty-seven".