1213073 has 4 divisors (see below), whose sum is σ = 1241328. Its totient is φ = 1184820.

The previous prime is 1213063. The next prime is 1213081. The reversal of 1213073 is 3703121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1213073 - 2⁴ = 1213057 is a prime.

It is a super-2 number, since 2×1213073² = 2943092206658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213033) 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 3 ways as a sum of consecutive naturals, for example, 14063 + ... + 14148.

It is an arithmetic number, because the mean of its divisors is an integer number (310332).

2^1213073 is an apocalyptic number.

It is an amenable number.

1213073 is a deficient number, since it is larger than the sum of its proper divisors (28255).

1213073 is an equidigital number, since it uses as much as digits as its factorization.

1213073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28254.

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 1213073 is about 1101.3959324421. The cubic root of 1213073 is about 106.6503566642.

Adding to 1213073 its reverse (3703121), we get a palindrome (4916194).

The spelling of 1213073 in words is "one million, two hundred thirteen thousand, seventy-three".