694145 has 4 divisors (see below), whose sum is σ = 832980. Its totient is φ = 555312.

The previous prime is 694123. The next prime is 694189. The reversal of 694145 is 541496.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 237169 + 456976 = 487^2 + 676^2 .

It is a cyclic number.

It is not a de Polignac number, because 694145 - 2⁶ = 694081 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69410 + ... + 69419.

It is an arithmetic number, because the mean of its divisors is an integer number (208245).

2⁶⁹⁴¹⁴⁵ is an apocalyptic number.

It is an amenable number.

694145 is a deficient number, since it is larger than the sum of its proper divisors (138835).

694145 is a wasteful number, since it uses less digits than its factorization.

694145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138834.

The product of its digits is 4320, while the sum is 29.

The square root of 694145 is about 833.1536472944. The cubic root of 694145 is about 88.5421506471.

The spelling of 694145 in words is "six hundred ninety-four thousand, one hundred forty-five".