1231863141 has 16 divisors (see below), whose sum is σ = 1715935104. Its totient is φ = 784601664.

The previous prime is 1231863109. The next prime is 1231863167. The reversal of 1231863141 is 1413681321.

It is not a de Polignac number, because 1231863141 - 2⁵ = 1231863109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231863099 and 1231863108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231863181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50335 + ... + 70691.

It is an arithmetic number, because the mean of its divisors is an integer number (107245944).

Almost surely, 2^1231863141 is an apocalyptic number.

It is an amenable number.

1231863141 is a deficient number, since it is larger than the sum of its proper divisors (484071963).

1231863141 is a wasteful number, since it uses less digits than its factorization.

1231863141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21260.

The product of its digits is 3456, while the sum is 30.

The square root of 1231863141 is about 35097.9079291060. The cubic root of 1231863141 is about 1071.9819848856.

The spelling of 1231863141 in words is "one billion, two hundred thirty-one million, eight hundred sixty-three thousand, one hundred forty-one".