1830142861 has 4 divisors (see below), whose sum is σ = 1830268924. Its totient is φ = 1830016800.

The previous prime is 1830142829. The next prime is 1830142883. The reversal of 1830142861 is 1682410381.

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 1392036100 + 438106761 = 37310^2 + 20931^2 .

It is a cyclic number.

It is not a de Polignac number, because 1830142861 - 2⁵ = 1830142829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1830142891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37920 + ... + 71401.

It is an arithmetic number, because the mean of its divisors is an integer number (457567231).

Almost surely, 2^1830142861 is an apocalyptic number.

It is an amenable number.

1830142861 is a deficient number, since it is larger than the sum of its proper divisors (126063).

1830142861 is a wasteful number, since it uses less digits than its factorization.

1830142861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126062.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 1830142861 is about 42780.1690155614. The cubic root of 1830142861 is about 1223.1930290146.

The spelling of 1830142861 in words is "one billion, eight hundred thirty million, one hundred forty-two thousand, eight hundred sixty-one".