397742 has 8 divisors (see below), whose sum is σ = 605232. Its totient is φ = 196000.

The previous prime is 397729. The next prime is 397751. The reversal of 397742 is 247793.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 397699 and 397708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1259 + ... + 1542.

It is an arithmetic number, because the mean of its divisors is an integer number (75654).

2³⁹⁷⁷⁴² is an apocalyptic number.

397742 is a deficient number, since it is larger than the sum of its proper divisors (207490).

397742 is a wasteful number, since it uses less digits than its factorization.

397742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2874.

The product of its digits is 10584, while the sum is 32.

The square root of 397742 is about 630.6678999283. The cubic root of 397742 is about 73.5417258874.

The spelling of 397742 in words is "three hundred ninety-seven thousand, seven hundred forty-two".