709145 has 4 divisors (see below), whose sum is σ = 850980. Its totient is φ = 567312.

The previous prime is 709141. The next prime is 709151. The reversal of 709145 is 541907.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541907 = 83 ⋅6529.

It can be written as a sum of positive squares in 2 ways, for example, as 143641 + 565504 = 379^2 + 752^2 .

It is a cyclic number.

It is not a de Polignac number, because 709145 - 2² = 709141 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 709145.

It is not an unprimeable number, because it can be changed into a prime (709141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70910 + ... + 70919.

It is an arithmetic number, because the mean of its divisors is an integer number (212745).

2⁷⁰⁹¹⁴⁵ is an apocalyptic number.

It is an amenable number.

709145 is a deficient number, since it is larger than the sum of its proper divisors (141835).

709145 is a wasteful number, since it uses less digits than its factorization.

709145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141834.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 709145 is about 842.1074753260. The cubic root of 709145 is about 89.1753895252.

The spelling of 709145 in words is "seven hundred nine thousand, one hundred forty-five".