396545 has 4 divisors (see below), whose sum is σ = 475860. Its totient is φ = 317232.

The previous prime is 396541. The next prime is 396547. The reversal of 396545 is 545693.

It is a happy number.

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 261121 + 135424 = 511^2 + 368^2 .

It is a cyclic number.

It is not a de Polignac number, because 396545 - 2² = 396541 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (396541) 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, 39650 + ... + 39659.

It is an arithmetic number, because the mean of its divisors is an integer number (118965).

2³⁹⁶⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

396545 is a deficient number, since it is larger than the sum of its proper divisors (79315).

396545 is an equidigital number, since it uses as much as digits as its factorization.

396545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79314.

The product of its digits is 16200, while the sum is 32.

The square root of 396545 is about 629.7181909394. The cubic root of 396545 is about 73.4678774281.

It can be divided in two parts, 39 and 6545, that multiplied together give a triangular number (255255 = T₇₁₄).

The spelling of 396545 in words is "three hundred ninety-six thousand, five hundred forty-five".