1225420116 has 12 divisors (see below), whose sum is σ = 2859313632. Its totient is φ = 408473368.

The previous prime is 1225420103. The next prime is 1225420117. The reversal of 1225420116 is 6110245221.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225420117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51059160 + ... + 51059183.

It is an arithmetic number, because the mean of its divisors is an integer number (238276136).

Almost surely, 2^1225420116 is an apocalyptic number.

It is an amenable number.

1225420116 is an abundant number, since it is smaller than the sum of its proper divisors (1633893516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225420116 is a wasteful number, since it uses less digits than its factorization.

1225420116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102118350 (or 102118348 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1225420116 is about 35006.0011426612. The cubic root of 1225420116 is about 1070.1097846419.

Adding to 1225420116 its reverse (6110245221), we get a palindrome (7335665337).

The spelling of 1225420116 in words is "one billion, two hundred twenty-five million, four hundred twenty thousand, one hundred sixteen".