1241431999 has 2 divisors, whose sum is σ = 1241432000. Its totient is φ = 1241431998.

The previous prime is 1241431993. The next prime is 1241432053. The reversal of 1241431999 is 9991341421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1241431999 - 2¹¹ = 1241429951 is a prime.

It is a super-2 number, since 2×1241431999² = 3082306816282272002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1241431993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620715999 + 620716000.

It is an arithmetic number, because the mean of its divisors is an integer number (620716000).

Almost surely, 2^1241431999 is an apocalyptic number.

1241431999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1241431999 is an equidigital number, since it uses as much as digits as its factorization.

1241431999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

The square root of 1241431999 is about 35233.9608758368. The cubic root of 1241431999 is about 1074.7504736156.

The spelling of 1241431999 in words is "one billion, two hundred forty-one million, four hundred thirty-one thousand, nine hundred ninety-nine".