1609481 has 4 divisors (see below), whose sum is σ = 1621200. Its totient is φ = 1597764.

The previous prime is 1609477. The next prime is 1609493. The reversal of 1609481 is 1849061.

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 1609481 - 2² = 1609477 is a prime.

It is a super-2 number, since 2×1609481² = 5180858178722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1609381) 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, 5651 + ... + 5928.

It is an arithmetic number, because the mean of its divisors is an integer number (405300).

2^1609481 is an apocalyptic number.

It is an amenable number.

1609481 is a deficient number, since it is larger than the sum of its proper divisors (11719).

1609481 is a wasteful number, since it uses less digits than its factorization.

1609481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11718.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1609481 is about 1268.6532229100. The cubic root of 1609481 is about 117.1912764768.

The spelling of 1609481 in words is "one million, six hundred nine thousand, four hundred eighty-one".