1212638 has 16 divisors (see below), whose sum is σ = 2135904. Its totient is φ = 505440.

The previous prime is 1212613. The next prime is 1212641. The reversal of 1212638 is 8362121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 653 + ... + 1688.

It is an arithmetic number, because the mean of its divisors is an integer number (133494).

2^1212638 is an apocalyptic number.

1212638 is a deficient number, since it is larger than the sum of its proper divisors (923266).

1212638 is a wasteful number, since it uses less digits than its factorization.

1212638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387.

The product of its digits is 576, while the sum is 23.

The square root of 1212638 is about 1101.1984380665. The cubic root of 1212638 is about 106.6376071013.

Adding to 1212638 its reverse (8362121), we get a palindrome (9574759).

The spelling of 1212638 in words is "one million, two hundred twelve thousand, six hundred thirty-eight".