1745389 has 2 divisors, whose sum is σ = 1745390. Its totient is φ = 1745388.

The previous prime is 1745371. The next prime is 1745431. The reversal of 1745389 is 9835471.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1550025 + 195364 = 1245^2 + 442^2 .

It is an emirp because it is prime and its reverse (9835471) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1745389 - 2⁹ = 1744877 is a prime.

It is a super-2 number, since 2×1745389² = 6092765522642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1745489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 872694 + 872695.

It is an arithmetic number, because the mean of its divisors is an integer number (872695).

2^1745389 is an apocalyptic number.

It is an amenable number.

1745389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1745389 is an equidigital number, since it uses as much as digits as its factorization.

1745389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 1745389 is about 1321.1317118289. The cubic root of 1745389 is about 120.4011804390.

The spelling of 1745389 in words is "one million, seven hundred forty-five thousand, three hundred eighty-nine".