1231340671 has 8 divisors (see below), whose sum is σ = 1343874384. Its totient is φ = 1118905920.

The previous prime is 1231340633. The next prime is 1231340683. The reversal of 1231340671 is 1760431321.

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

It is not a de Polignac number, because 1231340671 - 2¹⁷ = 1231209599 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 (1231340611) 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, 2601 + ... + 49693.

It is an arithmetic number, because the mean of its divisors is an integer number (167984298).

Almost surely, 2^1231340671 is an apocalyptic number.

1231340671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1231340671 is a deficient number, since it is larger than the sum of its proper divisors (112533713).

1231340671 is a wasteful number, since it uses less digits than its factorization.

1231340671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49481.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 1231340671 is about 35090.4641035139. The cubic root of 1231340671 is about 1071.8304102478.

Adding to 1231340671 its reverse (1760431321), we get a palindrome (2991771992).

The spelling of 1231340671 in words is "one billion, two hundred thirty-one million, three hundred forty thousand, six hundred seventy-one".