1667741 has 2 divisors, whose sum is σ = 1667742. Its totient is φ = 1667740.

The previous prime is 1667723. The next prime is 1667747. The reversal of 1667741 is 1477661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1060900 + 606841 = 1030^2 + 779^2 .

It is an emirp because it is prime and its reverse (1477661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1667741 - 2¹⁸ = 1405597 is a prime.

It is equal to p₁₂₅₈₇₉ and since 1667741 and 125879 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 1667698 and 1667707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1667747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833870 + 833871.

It is an arithmetic number, because the mean of its divisors is an integer number (833871).

2^1667741 is an apocalyptic number.

It is an amenable number.

1667741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1667741 is an equidigital number, since it uses as much as digits as its factorization.

1667741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 32.

The square root of 1667741 is about 1291.4104692157. The cubic root of 1667741 is about 118.5885799381.

The spelling of 1667741 in words is "one million, six hundred sixty-seven thousand, seven hundred forty-one".