397445 has 8 divisors (see below), whose sum is σ = 493560. Its totient is φ = 306880.

The previous prime is 397433. The next prime is 397459. The reversal of 397445 is 544793.

It can be written as a sum of positive squares in 4 ways, for example, as 20449 + 376996 = 143^2 + 614^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 397445 - 2⁴ = 397429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1226 + ... + 1515.

It is an arithmetic number, because the mean of its divisors is an integer number (61695).

2³⁹⁷⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

397445 is a deficient number, since it is larger than the sum of its proper divisors (96115).

397445 is a wasteful number, since it uses less digits than its factorization.

397445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775.

The product of its digits is 15120, while the sum is 32.

The square root of 397445 is about 630.4323912998. The cubic root of 397445 is about 73.5234164210.

The spelling of 397445 in words is "three hundred ninety-seven thousand, four hundred forty-five".