1601009 has 8 divisors (see below), whose sum is σ = 1737288. Its totient is φ = 1469440.

The previous prime is 1600993. The next prime is 1601023. The reversal of 1601009 is 9001061.

It can be written as a sum of positive squares in 4 ways, for example, as 93025 + 1507984 = 305^2 + 1228^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1601009 - 2⁴ = 1600993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1601059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452 + ... + 1845.

It is an arithmetic number, because the mean of its divisors is an integer number (217161).

2^1601009 is an apocalyptic number.

It is an amenable number.

1601009 is a deficient number, since it is larger than the sum of its proper divisors (136279).

1601009 is a wasteful number, since it uses less digits than its factorization.

1601009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2355.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1601009 is about 1265.3098434771. The cubic root of 1601009 is about 116.9852904779.

The spelling of 1601009 in words is "one million, six hundred one thousand, nine".