1227641 has 8 divisors (see below), whose sum is σ = 1268064. Its totient is φ = 1188000.

The previous prime is 1227637. The next prime is 1227649. The reversal of 1227641 is 1467221.

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 1227641 - 2² = 1227637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1227649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4766 + ... + 5016.

It is an arithmetic number, because the mean of its divisors is an integer number (158508).

2^1227641 is an apocalyptic number.

It is an amenable number.

1227641 is a deficient number, since it is larger than the sum of its proper divisors (40423).

1227641 is an equidigital number, since it uses as much as digits as its factorization.

1227641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391.

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

The square root of 1227641 is about 1107.9896208900. The cubic root of 1227641 is about 107.0755863860.

Adding to 1227641 its sum of digits (23), we get a square (1227664 = 1108²).

The spelling of 1227641 in words is "one million, two hundred twenty-seven thousand, six hundred forty-one".