397545 has 16 divisors (see below), whose sum is σ = 673920. Its totient is φ = 199424.

The previous prime is 397543. The next prime is 397547. The reversal of 397545 is 545793.

It is an interprime number because it is at equal distance from previous prime (397543) and next prime (397547).

It is a cyclic number.

It is not a de Polignac number, because 397545 - 2¹ = 397543 is a prime.

397545 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (397541) 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, 525 + ... + 1034.

It is an arithmetic number, because the mean of its divisors is an integer number (42120).

2³⁹⁷⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

397545 is a deficient number, since it is larger than the sum of its proper divisors (276375).

397545 is a wasteful number, since it uses less digits than its factorization.

397545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584.

The product of its digits is 18900, while the sum is 33.

The square root of 397545 is about 630.5116969573. The cubic root of 397545 is about 73.5295822427.

The spelling of 397545 in words is "three hundred ninety-seven thousand, five hundred forty-five".