1221479 has 8 divisors (see below), whose sum is σ = 1404288. Its totient is φ = 1040760.

The previous prime is 1221469. The next prime is 1221499. The reversal of 1221479 is 9741221.

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

It is not a de Polignac number, because 1221479 - 2⁴ = 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 (1221449) 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, 1064 + ... + 1890.

It is an arithmetic number, because the mean of its divisors is an integer number (175536).

2^1221479 is an apocalyptic number.

1221479 is a deficient number, since it is larger than the sum of its proper divisors (182809).

1221479 is an equidigital number, since it uses as much as digits as its factorization.

1221479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045.

The product of its digits is 1008, while the sum is 26.

The square root of 1221479 is about 1105.2054107721. The cubic root of 1221479 is about 106.8961346892.

The spelling of 1221479 in words is "one million, two hundred twenty-one thousand, four hundred seventy-nine".