645095 has 16 divisors (see below), whose sum is σ = 870048. Its totient is φ = 455040.

The previous prime is 645091. The next prime is 645097. The reversal of 645095 is 590546.

645095 = T₁₈₁ + T₁₈₂ + ... + T₂₁₃.

It is not a de Polignac number, because 645095 - 2² = 645091 is a prime.

It is a super-2 number, since 2×645095² = 832295118050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1877 + ... + 2193.

It is an arithmetic number, because the mean of its divisors is an integer number (54378).

2⁶⁴⁵⁰⁹⁵ is an apocalyptic number.

645095 is a deficient number, since it is larger than the sum of its proper divisors (224953).

645095 is a wasteful number, since it uses less digits than its factorization.

645095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 645095 is about 803.1780624494. The cubic root of 645095 is about 86.4054676895.

The spelling of 645095 in words is "six hundred forty-five thousand, ninety-five".