397426 has 8 divisors (see below), whose sum is σ = 631260. Its totient is φ = 187008.

The previous prime is 397379. The next prime is 397427. The reversal of 397426 is 624793.

It can be written as a sum of positive squares in 2 ways, for example, as 308025 + 89401 = 555^2 + 299^2 .

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

It is not an unprimeable number, because it can be changed into a prime (397427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5811 + ... + 5878.

2³⁹⁷⁴²⁶ is an apocalyptic number.

397426 is a deficient number, since it is larger than the sum of its proper divisors (233834).

397426 is a wasteful number, since it uses less digits than its factorization.

397426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11708.

The product of its digits is 9072, while the sum is 31.

The square root of 397426 is about 630.4173220970. The cubic root of 397426 is about 73.5222447979.

The spelling of 397426 in words is "three hundred ninety-seven thousand, four hundred twenty-six".