1645652 has 12 divisors (see below), whose sum is σ = 2897076. Its totient is φ = 817920.

The previous prime is 1645643. The next prime is 1645661. The reversal of 1645652 is 2565461.

It is an interprime number because it is at equal distance from previous prime (1645643) and next prime (1645661).

It can be written as a sum of positive squares in 2 ways, for example, as 633616 + 1012036 = 796^2 + 1006^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413 + ... + 1860.

It is an arithmetic number, because the mean of its divisors is an integer number (241423).

2^1645652 is an apocalyptic number.

It is an amenable number.

1645652 is a deficient number, since it is larger than the sum of its proper divisors (1251424).

1645652 is a wasteful number, since it uses less digits than its factorization.

1645652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458 (or 2456 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 1645652 is about 1282.8296847205. The cubic root of 1645652 is about 118.0626881309.

The spelling of 1645652 in words is "one million, six hundred forty-five thousand, six hundred fifty-two".