1243522413 has 12 divisors (see below), whose sum is σ = 2052799008. Its totient is φ = 710584200.

The previous prime is 1243522387. The next prime is 1243522421. The reversal of 1243522413 is 3142253421.

1243522413 is a `hidden beast` number, since 1 + 2 + 435 + 224 + 1 + 3 = 666.

It is not a de Polignac number, because 1243522413 - 2¹² = 1243518317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243522453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9869163 + ... + 9869288.

It is an arithmetic number, because the mean of its divisors is an integer number (171066584).

Almost surely, 2^1243522413 is an apocalyptic number.

It is an amenable number.

1243522413 is a deficient number, since it is larger than the sum of its proper divisors (809276595).

1243522413 is a wasteful number, since it uses less digits than its factorization.

1243522413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19738464 (or 19738461 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 1243522413 is about 35263.6131586087. The cubic root of 1243522413 is about 1075.3533831531.

Adding to 1243522413 its reverse (3142253421), we get a palindrome (4385775834).

The spelling of 1243522413 in words is "one billion, two hundred forty-three million, five hundred twenty-two thousand, four hundred thirteen".