1625985 has 24 divisors (see below), whose sum is σ = 2942784. Its totient is φ = 828960.

The previous prime is 1625977. The next prime is 1625989. The reversal of 1625985 is 5895261.

It is a happy number.

1625985 is a `hidden beast` number, since 1 + 62 + 598 + 5 = 666.

It is not a de Polignac number, because 1625985 - 2³ = 1625977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1625989) 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, 250 + ... + 1820.

It is an arithmetic number, because the mean of its divisors is an integer number (122616).

2^1625985 is an apocalyptic number.

1625985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1625985 is a deficient number, since it is larger than the sum of its proper divisors (1316799).

1625985 is a wasteful number, since it uses less digits than its factorization.

1625985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605 (or 1602 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 1625985 is about 1275.1411686555. The cubic root of 1625985 is about 117.5904840974.

The spelling of 1625985 in words is "one million, six hundred twenty-five thousand, nine hundred eighty-five".