1861412159 has 8 divisors (see below), whose sum is σ = 1959792240. Its totient is φ = 1763073216.

The previous prime is 1861412117. The next prime is 1861412171. The reversal of 1861412159 is 9512141681.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1861412159 - 2¹² = 1861408063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861412359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136307 + ... + 149339.

It is an arithmetic number, because the mean of its divisors is an integer number (244974030).

Almost surely, 2^1861412159 is an apocalyptic number.

1861412159 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1861412159 is a deficient number, since it is larger than the sum of its proper divisors (98380081).

1861412159 is a wasteful number, since it uses less digits than its factorization.

1861412159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20569.

The product of its digits is 17280, while the sum is 38.

The square root of 1861412159 is about 43144.0860257811. The cubic root of 1861412159 is about 1230.1201017411.

The spelling of 1861412159 in words is "one billion, eight hundred sixty-one million, four hundred twelve thousand, one hundred fifty-nine".