1212653 has 4 divisors (see below), whose sum is σ = 1305948. Its totient is φ = 1119360.

The previous prime is 1212649. The next prime is 1212671. The reversal of 1212653 is 3562121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 779689 + 432964 = 883^2 + 658^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212653 - 2² = 1212649 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46628 + ... + 46653.

It is an arithmetic number, because the mean of its divisors is an integer number (326487).

2^1212653 is an apocalyptic number.

1212653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1212653 is a deficient number, since it is larger than the sum of its proper divisors (93295).

1212653 is an equidigital number, since it uses as much as digits as its factorization.

1212653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93294.

The product of its digits is 360, while the sum is 20.

The square root of 1212653 is about 1101.2052488070. The cubic root of 1212653 is about 106.6380467921.

Adding to 1212653 its reverse (3562121), we get a palindrome (4774774).

The spelling of 1212653 in words is "one million, two hundred twelve thousand, six hundred fifty-three".