1212628 has 6 divisors (see below), whose sum is σ = 2122106. Its totient is φ = 606312.

The previous prime is 1212613. The next prime is 1212641. The reversal of 1212628 is 8262121.

It can be written as a sum of positive squares in only one way, i.e., 1192464 + 20164 = 1092^2 + 142^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1212599 and 1212608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151575 + ... + 151582.

2^1212628 is an apocalyptic number.

It is an amenable number.

1212628 is a deficient number, since it is larger than the sum of its proper divisors (909478).

1212628 is a wasteful number, since it uses less digits than its factorization.

1212628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303161 (or 303159 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

The square root of 1212628 is about 1101.1938975494. The cubic root of 1212628 is about 106.6373139720.

Adding to 1212628 its reverse (8262121), we get a palindrome (9474749).

The spelling of 1212628 in words is "one million, two hundred twelve thousand, six hundred twenty-eight".