695645 has 6 divisors (see below), whose sum is σ = 837018. Its totient is φ = 555024.

The previous prime is 695641. The next prime is 695659. The reversal of 695645 is 546596.

695645 = T₅₂₅ + T₅₂₆ + ... + T₅₂₉.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 88804 + 606841 = 298^2 + 779^2 .

It is not a de Polignac number, because 695645 - 2² = 695641 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (695641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1679 + ... + 2051.

It is an arithmetic number, because the mean of its divisors is an integer number (139503).

2⁶⁹⁵⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

695645 is a deficient number, since it is larger than the sum of its proper divisors (141373).

695645 is an frugal number, since it uses more digits than its factorization.

695645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751 (or 378 counting only the distinct ones).

The product of its digits is 32400, while the sum is 35.

The square root of 695645 is about 834.0533556074. The cubic root of 695645 is about 88.6058826118.

Subtracting from 695645 its sum of digits (35), we obtain a triangular number (695610 = T₁₁₇₉).

The spelling of 695645 in words is "six hundred ninety-five thousand, six hundred forty-five".