1601181 has 16 divisors (see below), whose sum is σ = 2449920. Its totient is φ = 1032480.

The previous prime is 1601161. The next prime is 1601203. The reversal of 1601181 is 1811061.

It is not a de Polignac number, because 1601181 - 2¹⁴ = 1584797 is a prime.

It is a super-2 number, since 2×1601181² = 5127561189522, which contains 22 as substring.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 120 + ... + 1793.

It is an arithmetic number, because the mean of its divisors is an integer number (153120).

2^1601181 is an apocalyptic number.

It is an amenable number.

1601181 is a deficient number, since it is larger than the sum of its proper divisors (848739).

1601181 is a wasteful number, since it uses less digits than its factorization.

1601181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953 (or 1947 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 1601181 is about 1265.3778091938. The cubic root of 1601181 is about 116.9894796589.

The spelling of 1601181 in words is "one million, six hundred one thousand, one hundred eighty-one".