1212646 has 4 divisors (see below), whose sum is σ = 1818972. Its totient is φ = 606322.

The previous prime is 1212641. The next prime is 1212649. The reversal of 1212646 is 6462121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6462121 = 79 ⋅81799.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303160 + ... + 303163.

It is an arithmetic number, because the mean of its divisors is an integer number (454743).

2^1212646 is an apocalyptic number.

1212646 is a deficient number, since it is larger than the sum of its proper divisors (606326).

1212646 is an equidigital number, since it uses as much as digits as its factorization.

1212646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606325.

The product of its digits is 576, while the sum is 22.

The square root of 1212646 is about 1101.2020704666. The cubic root of 1212646 is about 106.6378416035.

Adding to 1212646 its reverse (6462121), we get a palindrome (7674767).

The spelling of 1212646 in words is "one million, two hundred twelve thousand, six hundred forty-six".