1213065413 has 24 divisors (see below), whose sum is σ = 1509627672. Its totient is φ = 968454144.

The previous prime is 1213065407. The next prime is 1213065419. The reversal of 1213065413 is 3145603121.

It is an interprime number because it is at equal distance from previous prime (1213065407) and next prime (1213065419).

It can be written as a sum of positive squares in 4 ways, for example, as 426711649 + 786353764 = 20657^2 + 28042^2 .

It is not a de Polignac number, because 1213065413 - 2⁶ = 1213065349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213065419) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73295 + ... + 88307.

It is an arithmetic number, because the mean of its divisors is an integer number (62901153).

Almost surely, 2^1213065413 is an apocalyptic number.

It is an amenable number.

1213065413 is a deficient number, since it is larger than the sum of its proper divisors (296562259).

1213065413 is a wasteful number, since it uses less digits than its factorization.

1213065413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15141 (or 15134 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1213065413 is about 34829.0886042113. The cubic root of 1213065413 is about 1066.5013432037.

Adding to 1213065413 its reverse (3145603121), we get a palindrome (4358668534).

The spelling of 1213065413 in words is "one billion, two hundred thirteen million, sixty-five thousand, four hundred thirteen".