1645016 has 8 divisors (see below), whose sum is σ = 3084420. Its totient is φ = 822504.

The previous prime is 1645009. The next prime is 1645019. The reversal of 1645016 is 6105461.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1644982 and 1645000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102806 + ... + 102821.

2^1645016 is an apocalyptic number.

It is an amenable number.

1645016 is a deficient number, since it is larger than the sum of its proper divisors (1439404).

1645016 is a wasteful number, since it uses less digits than its factorization.

1645016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205633 (or 205629 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1645016 is about 1282.5817712723. The cubic root of 1645016 is about 118.0474768256.

The spelling of 1645016 in words is "one million, six hundred forty-five thousand, sixteen".