1662225 has 24 divisors (see below), whose sum is σ = 2827200. Its totient is φ = 861120.

The previous prime is 1662223. The next prime is 1662229. The reversal of 1662225 is 5222661.

It is not a de Polignac number, because 1662225 - 2¹ = 1662223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1662195 and 1662204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662223) 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, 2476 + ... + 3074.

It is an arithmetic number, because the mean of its divisors is an integer number (117800).

2^1662225 is an apocalyptic number.

1662225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1662225 is a deficient number, since it is larger than the sum of its proper divisors (1164975).

1662225 is a wasteful number, since it uses less digits than its factorization.

1662225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 644 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 1662225 is about 1289.2730509865. The cubic root of 1662225 is about 118.4576928856.

Adding to 1662225 its reverse (5222661), we get a palindrome (6884886).

The spelling of 1662225 in words is "one million, six hundred sixty-two thousand, two hundred twenty-five".