1231046155 has 8 divisors (see below), whose sum is σ = 1477451232. Its totient is φ = 984706368.

The previous prime is 1231046149. The next prime is 1231046171. The reversal of 1231046155 is 5516401321.

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 1231046155 - 2³ = 1231046147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48762 + ... + 69568.

It is an arithmetic number, because the mean of its divisors is an integer number (184681404).

Almost surely, 2^1231046155 is an apocalyptic number.

1231046155 is a deficient number, since it is larger than the sum of its proper divisors (246405077).

1231046155 is a wasteful number, since it uses less digits than its factorization.

1231046155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32645.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1231046155 is about 35086.2673278307. The cubic root of 1231046155 is about 1071.7449488252.

Adding to 1231046155 its reverse (5516401321), we get a palindrome (6747447476).

The spelling of 1231046155 in words is "one billion, two hundred thirty-one million, forty-six thousand, one hundred fifty-five".