1221734 has 4 divisors (see below), whose sum is σ = 1832604. Its totient is φ = 610866.

The previous prime is 1221707. The next prime is 1221749. The reversal of 1221734 is 4371221.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305432 + ... + 305435.

It is an arithmetic number, because the mean of its divisors is an integer number (458151).

2^1221734 is an apocalyptic number.

1221734 is a deficient number, since it is larger than the sum of its proper divisors (610870).

1221734 is an equidigital number, since it uses as much as digits as its factorization.

1221734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610869.

The product of its digits is 336, while the sum is 20.

The square root of 1221734 is about 1105.3207679221. The cubic root of 1221734 is about 106.9035728353.

Adding to 1221734 its reverse (4371221), we get a palindrome (5592955).

The spelling of 1221734 in words is "one million, two hundred twenty-one thousand, seven hundred thirty-four".