1645156 has 12 divisors (see below), whose sum is σ = 2928240. Its totient is φ = 808520.

The previous prime is 1645151. The next prime is 1645157. The reversal of 1645156 is 6515461.

It is not an unprimeable number, because it can be changed into a prime (1645151) 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, 3250 + ... + 3721.

It is an arithmetic number, because the mean of its divisors is an integer number (244020).

2^1645156 is an apocalyptic number.

It is an amenable number.

1645156 is a deficient number, since it is larger than the sum of its proper divisors (1283084).

1645156 is a wasteful number, since it uses less digits than its factorization.

1645156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7034 (or 7032 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 1645156 is about 1282.6363475280. The cubic root of 1645156 is about 118.0508255626.

The spelling of 1645156 in words is "one million, six hundred forty-five thousand, one hundred fifty-six".