1645134 has 16 divisors (see below), whose sum is σ = 3463680. Its totient is φ = 519480.

The previous prime is 1645129. The next prime is 1645151. The reversal of 1645134 is 4315461.

1645134 is nontrivially palindromic in base 5.

It is a d-powerful number, because it can be written as 1 + 6⁶ + 4 + 5⁵ + 1 + 3¹³ + 4⁵ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7102 + ... + 7329.

It is an arithmetic number, because the mean of its divisors is an integer number (216480).

2^1645134 is an apocalyptic number.

1645134 is an abundant number, since it is smaller than the sum of its proper divisors (1818546).

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

1645134 is a wasteful number, since it uses less digits than its factorization.

1645134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14455.

The product of its digits is 1440, while the sum is 24.

The square root of 1645134 is about 1282.6277714130. The cubic root of 1645134 is about 118.0502993451.

It can be divided in two parts, 16 and 45134, that added together give a triangular number (45150 = T₃₀₀).

The spelling of 1645134 in words is "one million, six hundred forty-five thousand, one hundred thirty-four".