1609441 has 6 divisors (see below), whose sum is σ = 1709990. Its totient is φ = 1514496.

The previous prime is 1609423. The next prime is 1609457. The reversal of 1609441 is 1449061.

It can be written as a sum of positive squares in 3 ways, for example, as 390625 + 1218816 = 625^2 + 1104^2 .

It is not a de Polignac number, because 1609441 - 2¹⁷ = 1478369 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1609141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2496 + ... + 3073.

2^1609441 is an apocalyptic number.

It is an amenable number.

1609441 is a deficient number, since it is larger than the sum of its proper divisors (100549).

1609441 is an equidigital number, since it uses as much as digits as its factorization.

1609441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5603 (or 5586 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1609441 is about 1268.6374580628. The cubic root of 1609441 is about 117.1903056276.

The spelling of 1609441 in words is "one million, six hundred nine thousand, four hundred forty-one".