1612543 has 4 divisors (see below), whose sum is σ = 1650088. Its totient is φ = 1575000.

The previous prime is 1612537. The next prime is 1612561. The reversal of 1612543 is 3452161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3452161 = 1439 ⋅2399.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1612543 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18708 + ... + 18793.

It is an arithmetic number, because the mean of its divisors is an integer number (412522).

2^1612543 is an apocalyptic number.

1612543 is a deficient number, since it is larger than the sum of its proper divisors (37545).

1612543 is an equidigital number, since it uses as much as digits as its factorization.

1612543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37544.

The product of its digits is 720, while the sum is 22.

The square root of 1612543 is about 1269.8594410406. The cubic root of 1612543 is about 117.2655472857.

It can be divided in two parts, 161 and 2543, that added together give a square (2704 = 52²).

The spelling of 1612543 in words is "one million, six hundred twelve thousand, five hundred forty-three".