1202643 has 24 divisors (see below), whose sum is σ = 1972880. Its totient is φ = 699840.

The previous prime is 1202633. The next prime is 1202689. The reversal of 1202643 is 3462021.

It is a happy number.

1202643 is a `hidden beast` number, since 1 + 20 + 2 + 643 = 666.

It is not a de Polignac number, because 1202643 - 2⁴ = 1202627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1202603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1953 + ... + 2493.

2^1202643 is an apocalyptic number.

1202643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1202643 is a deficient number, since it is larger than the sum of its proper divisors (770237).

1202643 is a wasteful number, since it uses less digits than its factorization.

1202643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579 (or 576 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1202643 is about 1096.6508104224. The cubic root of 1202643 is about 106.3438165608.

Adding to 1202643 its reverse (3462021), we get a palindrome (4664664).

The spelling of 1202643 in words is "one million, two hundred two thousand, six hundred forty-three".