1645612 has 12 divisors (see below), whose sum is σ = 2957920. Its totient is φ = 800496.

The previous prime is 1645607. The next prime is 1645613. The reversal of 1645612 is 2165461.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1645613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5412 + ... + 5707.

2^1645612 is an apocalyptic number.

It is an amenable number.

1645612 is a deficient number, since it is larger than the sum of its proper divisors (1312308).

1645612 is a wasteful number, since it uses less digits than its factorization.

1645612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11160 (or 11158 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 1645612 is about 1282.8140940916. The cubic root of 1645612 is about 118.0617315605.

It can be divided in two parts, 164 and 5612, that added together give a square (5776 = 76²).

The spelling of 1645612 in words is "one million, six hundred forty-five thousand, six hundred twelve".