1645141 has 16 divisors (see below), whose sum is σ = 1866240. Its totient is φ = 1442560.

The previous prime is 1645129. The next prime is 1645151. The reversal of 1645141 is 1415461.

1645141 = 154² + 155² + ... + 204².

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1645141 is a prime.

It is a Duffinian number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 23136 + ... + 23206.

It is an arithmetic number, because the mean of its divisors is an integer number (116640).

2^1645141 is an apocalyptic number.

It is an amenable number.

1645141 is a deficient number, since it is larger than the sum of its proper divisors (221099).

1645141 is a wasteful number, since it uses less digits than its factorization.

1645141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164.

The product of its digits is 480, while the sum is 22.

The square root of 1645141 is about 1282.6305001831. The cubic root of 1645141 is about 118.0504667785.

The spelling of 1645141 in words is "one million, six hundred forty-five thousand, one hundred forty-one".