684052142 has 4 divisors (see below), whose sum is σ = 1026078216. Its totient is φ = 342026070.

The previous prime is 684052141. The next prime is 684052151. The reversal of 684052142 is 241250486.

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

It is a junction number, because it is equal to n+sod(n) for n = 684052099 and 684052108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684052141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171013034 + ... + 171013037.

It is an arithmetic number, because the mean of its divisors is an integer number (256519554).

Almost surely, 2^684052142 is an apocalyptic number.

684052142 is a deficient number, since it is larger than the sum of its proper divisors (342026074).

684052142 is a wasteful number, since it uses less digits than its factorization.

684052142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342026073.

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 684052142 is about 26154.3904918467. The cubic root of 684052142 is about 881.1091996300.

The spelling of 684052142 in words is "six hundred eighty-four million, fifty-two thousand, one hundred forty-two".