1223858 has 8 divisors (see below), whose sum is σ = 1899180. Its totient is φ = 590800.

The previous prime is 1223857. The next prime is 1223863. The reversal of 1223858 is 8583221.

It can be written as a sum of positive squares in 2 ways, for example, as 1203409 + 20449 = 1097^2 + 143^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1223858.

It is not an unprimeable number, because it can be changed into a prime (1223857) 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, 10493 + ... + 10608.

2^1223858 is an apocalyptic number.

1223858 is a deficient number, since it is larger than the sum of its proper divisors (675322).

1223858 is a wasteful number, since it uses less digits than its factorization.

1223858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21132.

The product of its digits is 3840, while the sum is 29.

The square root of 1223858 is about 1106.2811577533. The cubic root of 1223858 is about 106.9654880399.

The spelling of 1223858 in words is "one million, two hundred twenty-three thousand, eight hundred fifty-eight".