1601761 has 12 divisors (see below), whose sum is σ = 1888068. Its totient is φ = 1354752.

The previous prime is 1601749. The next prime is 1601773. The reversal of 1601761 is 1671061.

It is an interprime number because it is at equal distance from previous prime (1601749) and next prime (1601773).

It can be written as a sum of positive squares in 2 ways, for example, as 571536 + 1030225 = 756^2 + 1015^2 .

It is not a de Polignac number, because 1601761 - 2⁵ = 1601729 is a prime.

It is a super-2 number, since 2×1601761² = 5131276602242, which contains 22 as substring.

1601761 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1601711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4585 + ... + 4921.

It is an arithmetic number, because the mean of its divisors is an integer number (157339).

2^1601761 is an apocalyptic number.

It is an amenable number.

1601761 is a deficient number, since it is larger than the sum of its proper divisors (286307).

1601761 is an equidigital number, since it uses as much as digits as its factorization.

1601761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 1601761 is about 1265.6069690074. The cubic root of 1601761 is about 117.0036037559.

The spelling of 1601761 in words is "one million, six hundred one thousand, seven hundred sixty-one".