1646225 has 24 divisors (see below), whose sum is σ = 2440320. Its totient is φ = 1077120.

The previous prime is 1646221. The next prime is 1646237. The reversal of 1646225 is 5226461.

It is not a de Polignac number, because 1646225 - 2² = 1646221 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1646194 and 1646203.

It is not an unprimeable number, because it can be changed into a prime (1646221) 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, 3821 + ... + 4229.

It is an arithmetic number, because the mean of its divisors is an integer number (101680).

2^1646225 is an apocalyptic number.

It is an amenable number.

1646225 is a deficient number, since it is larger than the sum of its proper divisors (794095).

1646225 is a wasteful number, since it uses less digits than its factorization.

1646225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 444 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

The square root of 1646225 is about 1283.0529996847. The cubic root of 1646225 is about 118.0763893002.

It can be divided in two parts, 16 and 46225, that multiplied together give a square (739600 = 860²).

The spelling of 1646225 in words is "one million, six hundred forty-six thousand, two hundred twenty-five".