1213505425 has 12 divisors (see below), whose sum is σ = 1641542256. Its totient is φ = 882549200.

The previous prime is 1213505417. The next prime is 1213505429. The reversal of 1213505425 is 5245053121.

It is not a de Polignac number, because 1213505425 - 2³ = 1213505417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213505393 and 1213505402.

It is not an unprimeable number, because it can be changed into a prime (1213505429) 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, 2206099 + ... + 2206648.

It is an arithmetic number, because the mean of its divisors is an integer number (136795188).

Almost surely, 2^1213505425 is an apocalyptic number.

It is an amenable number.

1213505425 is a deficient number, since it is larger than the sum of its proper divisors (428036831).

1213505425 is a wasteful number, since it uses less digits than its factorization.

1213505425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4412768 (or 4412763 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1213505425 is about 34835.4047629707. The cubic root of 1213505425 is about 1066.6302773502.

Adding to 1213505425 its reverse (5245053121), we get a palindrome (6458558546).

The spelling of 1213505425 in words is "one billion, two hundred thirteen million, five hundred five thousand, four hundred twenty-five".