1123413251 has 2 divisors, whose sum is σ = 1123413252. Its totient is φ = 1123413250.

The previous prime is 1123413233. The next prime is 1123413253. The reversal of 1123413251 is 1523143211.

It is a strong prime.

It is an emirp because it is prime and its reverse (1523143211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123413251 is a prime.

Together with 1123413253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1123413253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561706625 + 561706626.

It is an arithmetic number, because the mean of its divisors is an integer number (561706626).

Almost surely, 2^1123413251 is an apocalyptic number.

1123413251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123413251 is an equidigital number, since it uses as much as digits as its factorization.

1123413251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 23.

The square root of 1123413251 is about 33517.3574584871. The cubic root of 1123413251 is about 1039.5527079853.

Adding to 1123413251 its reverse (1523143211), we get a palindrome (2646556462).

The spelling of 1123413251 in words is "one billion, one hundred twenty-three million, four hundred thirteen thousand, two hundred fifty-one".