1243035401 has 2 divisors, whose sum is σ = 1243035402. Its totient is φ = 1243035400.

The previous prime is 1243035377. The next prime is 1243035421. The reversal of 1243035401 is 1045303421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1180609600 + 62425801 = 34360^2 + 7901^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243035401 is a prime.

It is not a weakly prime, because it can be changed into another prime (1243035421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621517700 + 621517701.

It is an arithmetic number, because the mean of its divisors is an integer number (621517701).

Almost surely, 2^1243035401 is an apocalyptic number.

It is an amenable number.

1243035401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243035401 is an equidigital number, since it uses as much as digits as its factorization.

1243035401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1243035401 is about 35256.7071775003. The cubic root of 1243035401 is about 1075.2129813451.

Adding to 1243035401 its reverse (1045303421), we get a palindrome (2288338822).

The spelling of 1243035401 in words is "one billion, two hundred forty-three million, thirty-five thousand, four hundred one".