1225158 has 32 divisors (see below), whose sum is σ = 2816640. Its totient is φ = 351360.

The previous prime is 1225157. The next prime is 1225183. The reversal of 1225158 is 8515221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225153) 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, 766 + ... + 1742.

It is an arithmetic number, because the mean of its divisors is an integer number (88020).

2^1225158 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1408320).

1225158 is an abundant number, since it is smaller than the sum of its proper divisors (1591482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225158 is a wasteful number, since it uses less digits than its factorization.

1225158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012.

The product of its digits is 800, while the sum is 24.

The square root of 1225158 is about 1106.8685558819. The cubic root of 1225158 is about 107.0033480770.

The spelling of 1225158 in words is "one million, two hundred twenty-five thousand, one hundred fifty-eight".