1230187155 has 16 divisors (see below), whose sum is σ = 1978195200. Its totient is φ = 652801248.

The previous prime is 1230187139. The next prime is 1230187157. The reversal of 1230187155 is 5517810321.

It is not a de Polignac number, because 1230187155 - 2⁴ = 1230187139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1230187157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203077 + ... + 209046.

It is an arithmetic number, because the mean of its divisors is an integer number (123637200).

Almost surely, 2^1230187155 is an apocalyptic number.

1230187155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1230187155 is a deficient number, since it is larger than the sum of its proper divisors (748008045).

1230187155 is a wasteful number, since it uses less digits than its factorization.

1230187155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412330.

The product of its (nonzero) digits is 8400, while the sum is 33.

The square root of 1230187155 is about 35074.0239351005. The cubic root of 1230187155 is about 1071.4956099133.

Adding to 1230187155 its reverse (5517810321), we get a palindrome (6747997476).

The spelling of 1230187155 in words is "one billion, two hundred thirty million, one hundred eighty-seven thousand, one hundred fifty-five".