1213425013 has 4 divisors (see below), whose sum is σ = 1214411968. Its totient is φ = 1212438060.

The previous prime is 1213424981. The next prime is 1213425019. The reversal of 1213425013 is 3105243121.

It is a happy number.

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 1213425013 - 2⁵ = 1213424981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213425019) 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, 491631 + ... + 494092.

It is an arithmetic number, because the mean of its divisors is an integer number (303602992).

Almost surely, 2^1213425013 is an apocalyptic number.

It is an amenable number.

1213425013 is a deficient number, since it is larger than the sum of its proper divisors (986955).

1213425013 is an equidigital number, since it uses as much as digits as its factorization.

1213425013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986954.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1213425013 is about 34834.2505732505. The cubic root of 1213425013 is about 1066.6067170192.

Adding to 1213425013 its reverse (3105243121), we get a palindrome (4318668134).

The spelling of 1213425013 in words is "one billion, two hundred thirteen million, four hundred twenty-five thousand, thirteen".