1609541 has 4 divisors (see below), whose sum is σ = 1633632. Its totient is φ = 1585452.

The previous prime is 1609523. The next prime is 1609549. The reversal of 1609541 is 1459061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1609541 - 2⁶ = 1609477 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 1609541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1609549) 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, 11945 + ... + 12078.

It is an arithmetic number, because the mean of its divisors is an integer number (408408).

2^1609541 is an apocalyptic number.

It is an amenable number.

1609541 is a deficient number, since it is larger than the sum of its proper divisors (24091).

1609541 is an equidigital number, since it uses as much as digits as its factorization.

1609541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24090.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1609541 is about 1268.6768698136. The cubic root of 1609541 is about 117.1927327204.

The spelling of 1609541 in words is "one million, six hundred nine thousand, five hundred forty-one".