397145 has 12 divisors (see below), whose sum is σ = 554724. Its totient is φ = 272160.

The previous prime is 397127. The next prime is 397151. The reversal of 397145 is 541793.

It can be written as a sum of positive squares in 2 ways, for example, as 226576 + 170569 = 476^2 + 413^2 .

It is not a de Polignac number, because 397145 - 2¹⁶ = 331609 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 566 + ... + 1055.

It is an arithmetic number, because the mean of its divisors is an integer number (46227).

2³⁹⁷¹⁴⁵ is an apocalyptic number.

397145 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

397145 is a deficient number, since it is larger than the sum of its proper divisors (157579).

397145 is a wasteful number, since it uses less digits than its factorization.

397145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640 (or 1633 counting only the distinct ones).

The product of its digits is 3780, while the sum is 29.

The square root of 397145 is about 630.1944144468. The cubic root of 397145 is about 73.5049127480.

The spelling of 397145 in words is "three hundred ninety-seven thousand, one hundred forty-five".