1231142541 has 8 divisors (see below), whose sum is σ = 1647324960. Its totient is φ = 817860912.

The previous prime is 1231142531. The next prime is 1231142579. The reversal of 1231142541 is 1452411321.

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

It is not a de Polignac number, because 1231142541 - 2¹⁷ = 1231011469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231142501) 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, 724206 + ... + 725903.

It is an arithmetic number, because the mean of its divisors is an integer number (205915620).

Almost surely, 2^1231142541 is an apocalyptic number.

It is an amenable number.

1231142541 is a deficient number, since it is larger than the sum of its proper divisors (416182419).

1231142541 is a wasteful number, since it uses less digits than its factorization.

1231142541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450395.

The product of its digits is 960, while the sum is 24.

The square root of 1231142541 is about 35087.6408582851. The cubic root of 1231142541 is about 1071.7729192124.

Adding to 1231142541 its reverse (1452411321), we get a palindrome (2683553862).

The spelling of 1231142541 in words is "one billion, two hundred thirty-one million, one hundred forty-two thousand, five hundred forty-one".