1213426625 has 32 divisors (see below), whose sum is σ = 1539772416. Its totient is φ = 954600000.

The previous prime is 1213426609. The next prime is 1213426633. The reversal of 1213426625 is 5266243121.

It is not a de Polignac number, because 1213426625 - 2⁴ = 1213426609 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213426591 and 1213426600.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2815160 + ... + 2815590.

It is an arithmetic number, because the mean of its divisors is an integer number (48117888).

Almost surely, 2^1213426625 is an apocalyptic number.

It is an amenable number.

1213426625 is a deficient number, since it is larger than the sum of its proper divisors (326345791).

1213426625 is a wasteful number, since it uses less digits than its factorization.

1213426625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770 (or 760 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 1213426625 is about 34834.2737113895. The cubic root of 1213426625 is about 1066.6071893377.

Adding to 1213426625 its reverse (5266243121), we get a palindrome (6479669746).

The spelling of 1213426625 in words is "one billion, two hundred thirteen million, four hundred twenty-six thousand, six hundred twenty-five".