340742 has 4 divisors (see below), whose sum is σ = 511116. Its totient is φ = 170370.

The previous prime is 340723. The next prime is 340757. The reversal of 340742 is 247043.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×340742² = 232210221128, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 340742.

It is an unprimeable number.

340742 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85184 + ... + 85187.

It is an arithmetic number, because the mean of its divisors is an integer number (127779).

2³⁴⁰⁷⁴² is an apocalyptic number.

340742 is a deficient number, since it is larger than the sum of its proper divisors (170374).

340742 is a wasteful number, since it uses less digits than its factorization.

340742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170373.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 340742 is about 583.7311024778. The cubic root of 340742 is about 69.8460562535.

Adding to 340742 its reverse (247043), we get a palindrome (587785).

The spelling of 340742 in words is "three hundred forty thousand, seven hundred forty-two", and thus it is an iban number.