1227642 has 16 divisors (see below), whose sum is σ = 2644320. Its totient is φ = 377712.

The previous prime is 1227637. The next prime is 1227649. The reversal of 1227642 is 2467221.

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, 7792 + ... + 7947.

It is an arithmetic number, because the mean of its divisors is an integer number (165270).

2^1227642 is an apocalyptic number.

1227642 is an abundant number, since it is smaller than the sum of its proper divisors (1416678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1227642 is a wasteful number, since it uses less digits than its factorization.

1227642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15757.

The product of its digits is 1344, while the sum is 24.

The square root of 1227642 is about 1107.9900721577. The cubic root of 1227642 is about 107.0756154595.

The spelling of 1227642 in words is "one million, two hundred twenty-seven thousand, six hundred forty-two".