1706491 has 2 divisors, whose sum is σ = 1706492. Its totient is φ = 1706490.

The previous prime is 1706489. The next prime is 1706501. The reversal of 1706491 is 1946071.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1706491 - 2¹ = 1706489 is a prime.

It is a super-2 number, since 2×1706491² = 5824223066162, which contains 22 as substring.

Together with 1706489, it forms a pair of twin primes.

It is a Chen prime.

1706491 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1706191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 853245 + 853246.

It is an arithmetic number, because the mean of its divisors is an integer number (853246).

2^1706491 is an apocalyptic number.

1706491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1706491 is an equidigital number, since it uses as much as digits as its factorization.

1706491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1706491 is about 1306.3272943639. The cubic root of 1706491 is about 119.5000262600.

It can be divided in two parts, 1706 and 491, that added together give a cube (2197 = 13³).

The spelling of 1706491 in words is "one million, seven hundred six thousand, four hundred ninety-one".