1213355 has 16 divisors (see below), whose sum is σ = 1711584. Its totient is φ = 814080.

The previous prime is 1213339. The next prime is 1213357. The reversal of 1213355 is 5533121.

It is not a de Polignac number, because 1213355 - 2⁴ = 1213339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134 + ... + 1563.

It is an arithmetic number, because the mean of its divisors is an integer number (106974).

2^1213355 is an apocalyptic number.

1213355 is a deficient number, since it is larger than the sum of its proper divisors (498229).

1213355 is a wasteful number, since it uses less digits than its factorization.

1213355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726.

The product of its digits is 450, while the sum is 20.

The square root of 1213355 is about 1101.5239443607. The cubic root of 1213355 is about 106.6586202698.

Adding to 1213355 its reverse (5533121), we get a palindrome (6746476).

The spelling of 1213355 in words is "one million, two hundred thirteen thousand, three hundred fifty-five".