342481781 has 4 divisors (see below), whose sum is σ = 344256492. Its totient is φ = 340707072.

The previous prime is 342481771. The next prime is 342481787. The reversal of 342481781 is 187184243.

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 122434225 + 220047556 = 11065^2 + 14834^2 .

It is a cyclic number.

It is not a de Polignac number, because 342481781 - 2⁶ = 342481717 is a prime.

It is a super-2 number, since 2×342481781² = 234587540633863922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342481787) 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, 887066 + ... + 887451.

It is an arithmetic number, because the mean of its divisors is an integer number (86064123).

Almost surely, 2^342481781 is an apocalyptic number.

It is an amenable number.

342481781 is a deficient number, since it is larger than the sum of its proper divisors (1774711).

342481781 is a wasteful number, since it uses less digits than its factorization.

342481781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774710.

The product of its digits is 43008, while the sum is 38.

The square root of 342481781 is about 18506.2632911131. The cubic root of 342481781 is about 699.6472923798.

The spelling of 342481781 in words is "three hundred forty-two million, four hundred eighty-one thousand, seven hundred eighty-one".