1749641 has 2 divisors, whose sum is σ = 1749642. Its totient is φ = 1749640.

The previous prime is 1749617. The next prime is 1749647. The reversal of 1749641 is 1469471.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1430416 + 319225 = 1196^2 + 565^2 .

It is an emirp because it is prime and its reverse (1469471) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1749641 is a prime.

It is a super-2 number, since 2×1749641² = 6122487257762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1749598 and 1749607.

It is not a weakly prime, because it can be changed into another prime (1749647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 874820 + 874821.

It is an arithmetic number, because the mean of its divisors is an integer number (874821).

2^1749641 is an apocalyptic number.

It is an amenable number.

1749641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1749641 is an equidigital number, since it uses as much as digits as its factorization.

1749641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 1749641 is about 1322.7399593269. The cubic root of 1749641 is about 120.4988722540.

The spelling of 1749641 in words is "one million, seven hundred forty-nine thousand, six hundred forty-one".