1671625 has 16 divisors (see below), whose sum is σ = 2141568. Its totient is φ = 1302000.

The previous prime is 1671619. The next prime is 1671629. The reversal of 1671625 is 5261761.

It is not a de Polignac number, because 1671625 - 2⁷ = 1671497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1671593 and 1671602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671629) 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, 5220 + ... + 5530.

It is an arithmetic number, because the mean of its divisors is an integer number (133848).

2^1671625 is an apocalyptic number.

It is an amenable number.

1671625 is a deficient number, since it is larger than the sum of its proper divisors (469943).

1671625 is an equidigital number, since it uses as much as digits as its factorization.

1671625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 359 counting only the distinct ones).

The product of its digits is 2520, while the sum is 28.

The square root of 1671625 is about 1292.9133768354. The cubic root of 1671625 is about 118.6805688309.

The spelling of 1671625 in words is "one million, six hundred seventy-one thousand, six hundred twenty-five".