1601597 has 4 divisors (see below), whose sum is σ = 1614336. Its totient is φ = 1588860.

The previous prime is 1601591. The next prime is 1601599. The reversal of 1601597 is 7951061.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7951061 = 787 ⋅10103.

It is a cyclic number.

It is not a de Polignac number, because 1601597 - 2⁶ = 1601533 is a prime.

It is a super-2 number, since 2×1601597² = 5130225900818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601591) 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, 6179 + ... + 6432.

It is an arithmetic number, because the mean of its divisors is an integer number (403584).

2^1601597 is an apocalyptic number.

It is an amenable number.

1601597 is a deficient number, since it is larger than the sum of its proper divisors (12739).

1601597 is a wasteful number, since it uses less digits than its factorization.

1601597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12738.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 1601597 is about 1265.5421763023. The cubic root of 1601597 is about 116.9996103915. Note that the first 3 decimals are identical.

The spelling of 1601597 in words is "one million, six hundred one thousand, five hundred ninety-seven".