1213727 has 4 divisors (see below), whose sum is σ = 1217280. Its totient is φ = 1210176.

The previous prime is 1213721. The next prime is 1213741. The reversal of 1213727 is 7273121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7273121 = 1667 ⋅4363.

It is a cyclic number.

It is not a de Polignac number, because 1213727 - 2¹⁰ = 1212703 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 (1213721) 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, 1202 + ... + 1967.

It is an arithmetic number, because the mean of its divisors is an integer number (304320).

2^1213727 is an apocalyptic number.

1213727 is a deficient number, since it is larger than the sum of its proper divisors (3553).

1213727 is an equidigital number, since it uses as much as digits as its factorization.

1213727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3552.

The product of its digits is 588, while the sum is 23.

The square root of 1213727 is about 1101.6927883943. The cubic root of 1213727 is about 106.6695192379.

Adding to 1213727 its reverse (7273121), we get a palindrome (8486848).

The spelling of 1213727 in words is "one million, two hundred thirteen thousand, seven hundred twenty-seven".