1216011425 has 12 divisors (see below), whose sum is σ = 1556495616. Its totient is φ = 941427600.

The previous prime is 1216011413. The next prime is 1216011431. The reversal of 1216011425 is 5241106121.

It is not a de Polignac number, because 1216011425 - 2¹⁰ = 1216010401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1216011425.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 783749 + ... + 785298.

It is an arithmetic number, because the mean of its divisors is an integer number (129707968).

Almost surely, 2^1216011425 is an apocalyptic number.

It is an amenable number.

1216011425 is a deficient number, since it is larger than the sum of its proper divisors (340484191).

1216011425 is a wasteful number, since it uses less digits than its factorization.

1216011425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1569088 (or 1569083 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 1216011425 is about 34871.3553651131. The cubic root of 1216011425 is about 1067.3640022951.

Adding to 1216011425 its reverse (5241106121), we get a palindrome (6457117546).

The spelling of 1216011425 in words is "one billion, two hundred sixteen million, eleven thousand, four hundred twenty-five".