1645146 has 12 divisors (see below), whose sum is σ = 3564522. Its totient is φ = 548376.

The previous prime is 1645129. The next prime is 1645151. The reversal of 1645146 is 6415461.

1645146 is a `hidden beast` number, since 1 + 645 + 14 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1476225 + 168921 = 1215^2 + 411^2 .

It is a super-2 number, since 2×1645146² = 5413010722632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45681 + ... + 45716.

2^1645146 is an apocalyptic number.

1645146 is an abundant number, since it is smaller than the sum of its proper divisors (1919376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1645146 is a wasteful number, since it uses less digits than its factorization.

1645146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91405 (or 91402 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1645146 is about 1282.6324493010. The cubic root of 1645146 is about 118.0505863734.

The spelling of 1645146 in words is "one million, six hundred forty-five thousand, one hundred forty-six".