1684207242 has 28 divisors (see below), whose sum is σ = 3787736850. Its totient is φ = 561401928.

The previous prime is 1684207237. The next prime is 1684207243. The reversal of 1684207242 is 2427024861.

1684207242 is a `hidden beast` number, since 168 + 420 + 72 + 4 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1303137801 + 381069441 = 36099^2 + 19521^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1684207197 and 1684207206.

It is not an unprimeable number, because it can be changed into a prime (1684207243) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 576117 + ... + 579032.

Almost surely, 2^1684207242 is an apocalyptic number.

1684207242 is an abundant number, since it is smaller than the sum of its proper divisors (2103529608).

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

1684207242 is an equidigital number, since it uses as much as digits as its factorization.

1684207242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155169 (or 1155154 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 1684207242 is about 41039.0940689485. The cubic root of 1684207242 is about 1189.7759251379.

The spelling of 1684207242 in words is "one billion, six hundred eighty-four million, two hundred seven thousand, two hundred forty-two".