1625166 has 48 divisors (see below), whose sum is σ = 3841344. Its totient is φ = 494592.

The previous prime is 1625153. The next prime is 1625167. The reversal of 1625166 is 6615261.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625167) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14326 + ... + 14438.

It is an arithmetic number, because the mean of its divisors is an integer number (80028).

2^1625166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1625166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1920672).

1625166 is an abundant number, since it is smaller than the sum of its proper divisors (2216178).

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

1625166 is a wasteful number, since it uses less digits than its factorization.

1625166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 182 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1625166 is about 1274.8199872923. The cubic root of 1625166 is about 117.5707375478.

The spelling of 1625166 in words is "one million, six hundred twenty-five thousand, one hundred sixty-six".