1230820181 has 8 divisors (see below), whose sum is σ = 1257626400. Its totient is φ = 1204212240.

The previous prime is 1230820169. The next prime is 1230820189. The reversal of 1230820181 is 1810280321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1230820181 is a prime.

It is a super-2 number, since 2×1230820181² = 3029836635913745522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1230820181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230820189) 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, 36986 + ... + 61883.

It is an arithmetic number, because the mean of its divisors is an integer number (157203300).

Almost surely, 2^1230820181 is an apocalyptic number.

It is an amenable number.

1230820181 is a deficient number, since it is larger than the sum of its proper divisors (26806219).

1230820181 is an equidigital number, since it uses as much as digits as its factorization.

1230820181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99139.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 1230820181 is about 35083.0469172790. The cubic root of 1230820181 is about 1071.6793673921.

The spelling of 1230820181 in words is "one billion, two hundred thirty million, eight hundred twenty thousand, one hundred eighty-one".