1213853 has 8 divisors (see below), whose sum is σ = 1322400. Its totient is φ = 1109808.

The previous prime is 1213841. The next prime is 1213873. The reversal of 1213853 is 3583121.

1213853 = 117² + 118² + ... + 173².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213853 - 2⁴ = 1213837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551 + ... + 1652.

It is an arithmetic number, because the mean of its divisors is an integer number (165300).

2^1213853 is an apocalyptic number.

It is an amenable number.

1213853 is a deficient number, since it is larger than the sum of its proper divisors (108547).

1213853 is a wasteful number, since it uses less digits than its factorization.

1213853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251.

The product of its digits is 720, while the sum is 23.

The square root of 1213853 is about 1101.7499716360. The cubic root of 1213853 is about 106.6732103190.

Adding to 1213853 its reverse (3583121), we get a palindrome (4796974).

The spelling of 1213853 in words is "one million, two hundred thirteen thousand, eight hundred fifty-three".