1243450511 has 2 divisors, whose sum is σ = 1243450512. Its totient is φ = 1243450510.

The previous prime is 1243450489. The next prime is 1243450513. The reversal of 1243450511 is 1150543421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1243450511 - 2⁶ = 1243450447 is a prime.

It is a super-2 number, since 2×1243450511² = 3092338346612322242, which contains 22 as substring.

Together with 1243450513, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243450513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621725255 + 621725256.

It is an arithmetic number, because the mean of its divisors is an integer number (621725256).

Almost surely, 2^1243450511 is an apocalyptic number.

1243450511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243450511 is an equidigital number, since it uses as much as digits as its factorization.

1243450511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1243450511 is about 35262.5936510632. The cubic root of 1243450511 is about 1075.3326566672.

Adding to 1243450511 its reverse (1150543421), we get a palindrome (2393993932).

The spelling of 1243450511 in words is "one billion, two hundred forty-three million, four hundred fifty thousand, five hundred eleven".