1545845 has 16 divisors (see below), whose sum is σ = 2194560. Its totient is φ = 1022784.

The previous prime is 1545839. The next prime is 1545847. The reversal of 1545845 is 5485451.

It is not a de Polignac number, because 1545845 - 2¹⁸ = 1283701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1545847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254 + ... + 1776.

It is an arithmetic number, because the mean of its divisors is an integer number (137160).

2^1545845 is an apocalyptic number.

It is an amenable number.

1545845 is a deficient number, since it is larger than the sum of its proper divisors (648715).

1545845 is a wasteful number, since it uses less digits than its factorization.

1545845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564.

The product of its digits is 16000, while the sum is 32.

The square root of 1545845 is about 1243.3201518515. The cubic root of 1545845 is about 115.6259503209.

It can be divided in two parts, 15458 and 45, that multiplied together give a triangular number (695610 = T₁₁₇₉).

The spelling of 1545845 in words is "one million, five hundred forty-five thousand, eight hundred forty-five".