1642845 has 16 divisors (see below), whose sum is σ = 2714112. Its totient is φ = 847680.

The previous prime is 1642843. The next prime is 1642847. The reversal of 1642845 is 5482461.

It is an interprime number because it is at equal distance from previous prime (1642843) and next prime (1642847).

It is not a de Polignac number, because 1642845 - 2¹ = 1642843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642843) 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, 1302 + ... + 2231.

It is an arithmetic number, because the mean of its divisors is an integer number (169632).

2^1642845 is an apocalyptic number.

1642845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1642845 is a deficient number, since it is larger than the sum of its proper divisors (1071267).

1642845 is a wasteful number, since it uses less digits than its factorization.

1642845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3572.

The product of its digits is 7680, while the sum is 30.

The square root of 1642845 is about 1281.7351520498. The cubic root of 1642845 is about 117.9955231472.

The spelling of 1642845 in words is "one million, six hundred forty-two thousand, eight hundred forty-five".