1625625 has 45 divisors (see below), whose sum is σ = 3116971. Its totient is φ = 816000.

The previous prime is 1625587. The next prime is 1625629. The reversal of 1625625 is 5265261.

1625625 = 1³ + 2³ + ... + 50³.

The square root of 1625625 is 1275.

It is a perfect power (a square), and thus also a powerful number.

1625625 is a `hidden beast` number, since 16 + 25 + 625 = 666.

It can be written as a sum of positive squares in 7 ways, for example, as 793881 + 831744 = 891^2 + 912^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 1625625 - 2⁷ = 1625497 is a prime.

It is a Duffinian number.

Its product of digits (3600) is a multiple of the sum of its prime divisors (25).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1625629) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 95617 + ... + 95633.

2^1625625 is an apocalyptic number.

1625625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1625625 is the 1275-th square number.

1625625 is the 638-th centered octagonal number.

It is an amenable number.

1625625 is a deficient number, since it is larger than the sum of its proper divisors (1491346).

1625625 is an equidigital number, since it uses as much as digits as its factorization.

1625625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60 (or 25 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The cubic root of 1625625 is about 117.5818051123.

Multiplying 1625625 by its product of digits (3600), we get a square (5852250000 = 76500²).

The spelling of 1625625 in words is "one million, six hundred twenty-five thousand, six hundred twenty-five".