1625025 has 24 divisors (see below), whose sum is σ = 2749824. Its totient is φ = 846400.

The previous prime is 1625021. The next prime is 1625027. The reversal of 1625025 is 5205261.

It is not a de Polignac number, because 1625025 - 2² = 1625021 is a prime.

It is an Ulam number.

1625025 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1624992 and 1625010.

It is not an unprimeable number, because it can be changed into a prime (1625021) 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, 3295 + ... + 3755.

It is an arithmetic number, because the mean of its divisors is an integer number (114576).

2^1625025 is an apocalyptic number.

1625025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1625025 is a deficient number, since it is larger than the sum of its proper divisors (1124799).

1625025 is a wasteful number, since it uses less digits than its factorization.

1625025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1625025 is about 1274.7646841672. The cubic root of 1625025 is about 117.5673372893.

Adding to 1625025 its product of nonzero digits (600), we get a square (1625625 = 1275²).

The spelling of 1625025 in words is "one million, six hundred twenty-five thousand, twenty-five".