1223212425 has 24 divisors (see below), whose sum is σ = 2023638336. Its totient is φ = 651973440.

The previous prime is 1223212421. The next prime is 1223212433. The reversal of 1223212425 is 5242123221.

It is not a de Polignac number, because 1223212425 - 2² = 1223212421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223212395 and 1223212404.

It is not an unprimeable number, because it can be changed into a prime (1223212421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145692 + ... + 153858.

It is an arithmetic number, because the mean of its divisors is an integer number (84318264).

Almost surely, 2^1223212425 is an apocalyptic number.

1223212425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1223212425 is a deficient number, since it is larger than the sum of its proper divisors (800425911).

1223212425 is a wasteful number, since it uses less digits than its factorization.

1223212425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10177 (or 10172 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 1223212425 is about 34974.4538913762. The cubic root of 1223212425 is about 1069.4667692772.

Adding to 1223212425 its reverse (5242123221), we get a palindrome (6465335646).

The spelling of 1223212425 in words is "one billion, two hundred twenty-three million, two hundred twelve thousand, four hundred twenty-five".