1231425155 has 8 divisors (see below), whose sum is σ = 1481004000. Its totient is φ = 982944256.

The previous prime is 1231425127. The next prime is 1231425163. The reversal of 1231425155 is 5515241321.

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 1231425155 - 2¹⁴ = 1231408771 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272015 + ... + 276504.

It is an arithmetic number, because the mean of its divisors is an integer number (185125500).

Almost surely, 2^1231425155 is an apocalyptic number.

1231425155 is a deficient number, since it is larger than the sum of its proper divisors (249578845).

1231425155 is an equidigital number, since it uses as much as digits as its factorization.

1231425155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548973.

The product of its digits is 6000, while the sum is 29.

The square root of 1231425155 is about 35091.6678856962. The cubic root of 1231425155 is about 1071.8549229467.

Adding to 1231425155 its reverse (5515241321), we get a palindrome (6746666476).

The spelling of 1231425155 in words is "one billion, two hundred thirty-one million, four hundred twenty-five thousand, one hundred fifty-five".