345721842 has 24 divisors (see below), whose sum is σ = 752993280. Its totient is φ = 114636120.

The previous prime is 345721841. The next prime is 345721861. The reversal of 345721842 is 248127543.

It is a happy number.

345721842 is a `hidden beast` number, since 3 + 4 + 572 + 1 + 84 + 2 = 666.

345721842 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 345721797 and 345721806.

It is not an unprimeable number, because it can be changed into a prime (345721841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46842 + ... + 53717.

It is an arithmetic number, because the mean of its divisors is an integer number (31374720).

Almost surely, 2^345721842 is an apocalyptic number.

345721842 is an abundant number, since it is smaller than the sum of its proper divisors (407271438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

345721842 is a wasteful number, since it uses less digits than its factorization.

345721842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100758 (or 100755 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 345721842 is about 18593.5968010495. The cubic root of 345721842 is about 701.8467169650.

The spelling of 345721842 in words is "three hundred forty-five million, seven hundred twenty-one thousand, eight hundred forty-two".