1231361447 has 16 divisors (see below), whose sum is σ = 1295861760. Its totient is φ = 1168514400.

The previous prime is 1231361441. The next prime is 1231361491. The reversal of 1231361447 is 7441631321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231361447 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 (1231361441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1193822 + ... + 1194852.

It is an arithmetic number, because the mean of its divisors is an integer number (80991360).

Almost surely, 2^1231361447 is an apocalyptic number.

1231361447 is a deficient number, since it is larger than the sum of its proper divisors (64500313).

1231361447 is a wasteful number, since it uses less digits than its factorization.

1231361447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774.

The product of its digits is 12096, while the sum is 32.

The square root of 1231361447 is about 35090.7601371073. The cubic root of 1231361447 is about 1071.8364384261.

Adding to 1231361447 its reverse (7441631321), we get a palindrome (8672992768).

The spelling of 1231361447 in words is "one billion, two hundred thirty-one million, three hundred sixty-one thousand, four hundred forty-seven".