1213242413 has 4 divisors (see below), whose sum is σ = 1213722048. Its totient is φ = 1212762780.

The previous prime is 1213242409. The next prime is 1213242419. The reversal of 1213242413 is 3142423121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1213242413 - 2² = 1213242409 is a prime.

It is a super-3 number, since 3×1213242413³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213242419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236003 + ... + 241088.

It is an arithmetic number, because the mean of its divisors is an integer number (303430512).

Almost surely, 2^1213242413 is an apocalyptic number.

It is an amenable number.

1213242413 is a deficient number, since it is larger than the sum of its proper divisors (479635).

1213242413 is an equidigital number, since it uses as much as digits as its factorization.

1213242413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479634.

The product of its digits is 1152, while the sum is 23.

The square root of 1213242413 is about 34831.6294910244. The cubic root of 1213242413 is about 1066.5532122277.

Adding to 1213242413 its reverse (3142423121), we get a palindrome (4355665534).

It can be divided in two parts, 12132 and 42413, that added together give a palindrome (54545).

The spelling of 1213242413 in words is "one billion, two hundred thirteen million, two hundred forty-two thousand, four hundred thirteen".