1231457141 has 4 divisors (see below), whose sum is σ = 1232114400. Its totient is φ = 1230799884.

The previous prime is 1231457083. The next prime is 1231457167. The reversal of 1231457141 is 1417541321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1231457141 - 2¹⁸ = 1231194997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231457041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325811 + ... + 329568.

It is an arithmetic number, because the mean of its divisors is an integer number (308028600).

Almost surely, 2^1231457141 is an apocalyptic number.

It is an amenable number.

1231457141 is a deficient number, since it is larger than the sum of its proper divisors (657259).

1231457141 is an equidigital number, since it uses as much as digits as its factorization.

1231457141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657258.

The product of its digits is 3360, while the sum is 29.

The square root of 1231457141 is about 35092.1236319491. The cubic root of 1231457141 is about 1071.8642032657.

Adding to 1231457141 its reverse (1417541321), we get a palindrome (2648998462).

The spelling of 1231457141 in words is "one billion, two hundred thirty-one million, four hundred fifty-seven thousand, one hundred forty-one".