1213513 has 4 divisors (see below), whose sum is σ = 1386880. Its totient is φ = 1040148.

The previous prime is 1213483. The next prime is 1213517. The reversal of 1213513 is 3153121.

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 1213513 - 2⁵ = 1213481 is a prime.

It is a super-2 number, since 2×1213513² = 2945227602338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213517) 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, 86673 + ... + 86686.

It is an arithmetic number, because the mean of its divisors is an integer number (346720).

2^1213513 is an apocalyptic number.

It is an amenable number.

1213513 is a deficient number, since it is larger than the sum of its proper divisors (173367).

1213513 is an equidigital number, since it uses as much as digits as its factorization.

1213513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173366.

The product of its digits is 90, while the sum is 16.

The square root of 1213513 is about 1101.5956608484. The cubic root of 1213513 is about 106.6632496735.

Adding to 1213513 its reverse (3153121), we get a palindrome (4366634).

The spelling of 1213513 in words is "one million, two hundred thirteen thousand, five hundred thirteen".