1225858 has 4 divisors (see below), whose sum is σ = 1838790. Its totient is φ = 612928.

The previous prime is 1225849. The next prime is 1225871. The reversal of 1225858 is 8585221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1151329 + 74529 = 1073^2 + 273^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306463 + ... + 306466.

2^1225858 is an apocalyptic number.

1225858 is a deficient number, since it is larger than the sum of its proper divisors (612932).

1225858 is an equidigital number, since it uses as much as digits as its factorization.

1225858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612931.

The product of its digits is 6400, while the sum is 31.

The square root of 1225858 is about 1107.1847181026. The cubic root of 1225858 is about 107.0237231587.

The spelling of 1225858 in words is "one million, two hundred twenty-five thousand, eight hundred fifty-eight".