397121441 has 4 divisors (see below), whose sum is σ = 397264452. Its totient is φ = 396978432.

The previous prime is 397121429. The next prime is 397121477. The reversal of 397121441 is 144121793.

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 116726416 + 280395025 = 10804^2 + 16745^2 .

It is a cyclic number.

It is not a de Polignac number, because 397121441 - 2¹⁰ = 397120417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 397121398 and 397121407.

It is not an unprimeable number, because it can be changed into a prime (397121141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67256 + ... + 72921.

It is an arithmetic number, because the mean of its divisors is an integer number (99316113).

Almost surely, 2^397121441 is an apocalyptic number.

It is an amenable number.

397121441 is a deficient number, since it is larger than the sum of its proper divisors (143011).

397121441 is a wasteful number, since it uses less digits than its factorization.

397121441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143010.

The product of its digits is 6048, while the sum is 32.

The square root of 397121441 is about 19927.9060866916. The cubic root of 397121441 is about 735.0345925996.

The spelling of 397121441 in words is "three hundred ninety-seven million, one hundred twenty-one thousand, four hundred forty-one".