1740661 has 8 divisors (see below), whose sum is σ = 1885464. Its totient is φ = 1597440.

The previous prime is 1740649. The next prime is 1740689. The reversal of 1740661 is 1660471.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 286225 + 1454436 = 535^2 + 1206^2 .

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

It is not a de Polignac number, because 1740661 - 2¹¹ = 1738613 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1740611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3081 + ... + 3601.

It is an arithmetic number, because the mean of its divisors is an integer number (235683).

2^1740661 is an apocalyptic number.

It is an amenable number.

1740661 is a deficient number, since it is larger than the sum of its proper divisors (144803).

1740661 is a wasteful number, since it uses less digits than its factorization.

1740661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1740661 is about 1319.3411234400. The cubic root of 1740661 is about 120.2923658105.

It can be divided in two parts, 1740 and 661, that added together give a 4-th power (2401 = 7⁴).

The spelling of 1740661 in words is "one million, seven hundred forty thousand, six hundred sixty-one".