1625172 has 12 divisors (see below), whose sum is σ = 3792096. Its totient is φ = 541720.

The previous prime is 1625171. The next prime is 1625177. The reversal of 1625172 is 2715261.

1625172 is nontrivially palindromic in base 11.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625171) 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, 67704 + ... + 67727.

It is an arithmetic number, because the mean of its divisors is an integer number (316008).

2^1625172 is an apocalyptic number.

1625172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1625172 is an abundant number, since it is smaller than the sum of its proper divisors (2166924).

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

1625172 is a wasteful number, since it uses less digits than its factorization.

1625172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135438 (or 135436 counting only the distinct ones).

The product of its digits is 840, while the sum is 24.

The square root of 1625172 is about 1274.8223405636. The cubic root of 1625172 is about 117.5708822352.

The spelling of 1625172 in words is "one million, six hundred twenty-five thousand, one hundred seventy-two".