1231304461 has 2 divisors, whose sum is σ = 1231304462. Its totient is φ = 1231304460.

The previous prime is 1231304413. The next prime is 1231304479. The reversal of 1231304461 is 1644031321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 864007236 + 367297225 = 29394^2 + 19165^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231304461 - 2¹⁵ = 1231271693 is a prime.

It is a super-2 number, since 2×1231304461² = 3032221351357001042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231304411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615652230 + 615652231.

It is an arithmetic number, because the mean of its divisors is an integer number (615652231).

Almost surely, 2^1231304461 is an apocalyptic number.

It is an amenable number.

1231304461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231304461 is an equidigital number, since it uses as much as digits as its factorization.

1231304461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1231304461 is about 35089.9481475821. The cubic root of 1231304461 is about 1071.8199037160.

Adding to 1231304461 its reverse (1644031321), we get a palindrome (2875335782).

The spelling of 1231304461 in words is "one billion, two hundred thirty-one million, three hundred four thousand, four hundred sixty-one".