1601191 has 8 divisors (see below), whose sum is σ = 1710720. Its totient is φ = 1495032.

The previous prime is 1601161. The next prime is 1601203. The reversal of 1601191 is 1911061.

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

It is a cyclic number.

It is not a de Polignac number, because 1601191 - 2¹⁵ = 1568423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601161) 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, 180 + ... + 1798.

It is an arithmetic number, because the mean of its divisors is an integer number (213840).

2^1601191 is an apocalyptic number.

1601191 is a deficient number, since it is larger than the sum of its proper divisors (109529).

1601191 is a wasteful number, since it uses less digits than its factorization.

1601191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685.

The product of its (nonzero) digits is 54, while the sum is 19.

The square root of 1601191 is about 1265.3817605766. The cubic root of 1601191 is about 116.9897232067.

The spelling of 1601191 in words is "one million, six hundred one thousand, one hundred ninety-one".