1601004 has 12 divisors (see below), whose sum is σ = 3735704. Its totient is φ = 533664.

The previous prime is 1600993. The next prime is 1601023. The reversal of 1601004 is 4001061.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 133417 = 1601004 / (1 + 6 + 0 + 1 + 0 + 0 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66697 + ... + 66720.

2^1601004 is an apocalyptic number.

It is an amenable number.

1601004 is an abundant number, since it is smaller than the sum of its proper divisors (2134700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1601004 is a wasteful number, since it uses less digits than its factorization.

1601004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133424 (or 133422 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1601004 is about 1265.3078676749. The cubic root of 1601004 is about 116.9851686949.

Adding to 1601004 its reverse (4001061), we get a palindrome (5602065).

The spelling of 1601004 in words is "one million, six hundred one thousand, four".