1212642 has 12 divisors (see below), whose sum is σ = 2627430. Its totient is φ = 404208.

The previous prime is 1212641. The next prime is 1212649. The reversal of 1212642 is 2462121.

1212642 is a `hidden beast` number, since 1 + 21 + 2 + 642 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1212201 + 441 = 1101^2 + 21^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 67369 = 1212642 / (1 + 2 + 1 + 2 + 6 + 4 + 2).

It is a d-powerful number, because it can be written as 1 + 2³ + 1 + 2¹⁵ + 6³ + 4¹⁰ + 2¹⁷ .

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

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 in 5 ways as a sum of consecutive naturals, for example, 33667 + ... + 33702.

2^1212642 is an apocalyptic number.

1212642 is an abundant number, since it is smaller than the sum of its proper divisors (1414788).

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

1212642 is a wasteful number, since it uses less digits than its factorization.

1212642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67377 (or 67374 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 1212642 is about 1101.2002542680. The cubic root of 1212642 is about 106.6377243525.

Adding to 1212642 its reverse (2462121), we get a palindrome (3674763).

The spelling of 1212642 in words is "one million, two hundred twelve thousand, six hundred forty-two".