1601345 has 4 divisors (see below), whose sum is σ = 1921620. Its totient is φ = 1281072.

The previous prime is 1601317. The next prime is 1601359. The reversal of 1601345 is 5431061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5431061 = 2281 ⋅2381.

It can be written as a sum of positive squares in 2 ways, for example, as 258064 + 1343281 = 508^2 + 1159^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601345 - 2¹⁰ = 1600321 is a prime.

It is a Curzon number.

It is a congruent number.

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, 160130 + ... + 160139.

It is an arithmetic number, because the mean of its divisors is an integer number (480405).

2^1601345 is an apocalyptic number.

It is an amenable number.

1601345 is a deficient number, since it is larger than the sum of its proper divisors (320275).

1601345 is an equidigital number, since it uses as much as digits as its factorization.

1601345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320274.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1601345 is about 1265.4426103147. The cubic root of 1601345 is about 116.9934737149.

The spelling of 1601345 in words is "one million, six hundred one thousand, three hundred forty-five".