397121 has 4 divisors (see below), whose sum is σ = 407892. Its totient is φ = 386352.

The previous prime is 397099. The next prime is 397127. The reversal of 397121 is 121793.

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 190096 + 207025 = 436^2 + 455^2 .

It is a cyclic number.

It is not a de Polignac number, because 397121 - 2⁶ = 397057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397127) 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, 5330 + ... + 5403.

It is an arithmetic number, because the mean of its divisors is an integer number (101973).

2³⁹⁷¹²¹ is an apocalyptic number.

It is an amenable number.

397121 is a deficient number, since it is larger than the sum of its proper divisors (10771).

397121 is a wasteful number, since it uses less digits than its factorization.

397121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10770.

The product of its digits is 378, while the sum is 23.

The square root of 397121 is about 630.1753724163. The cubic root of 397121 is about 73.5034320516.

The spelling of 397121 in words is "three hundred ninety-seven thousand, one hundred twenty-one".