1212423425 has 24 divisors (see below), whose sum is σ = 1598040576. Its totient is φ = 909328640.

The previous prime is 1212423419. The next prime is 1212423427. The reversal of 1212423425 is 5243242121.

It is not a de Polignac number, because 1212423425 - 2⁸ = 1212423169 is a prime.

It is a super-2 number, since 2×1212423425² = 2939941122977461250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212423394 and 1212423403.

It is not an unprimeable number, because it can be changed into a prime (1212423427) 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, 106352 + ... + 117198.

It is an arithmetic number, because the mean of its divisors is an integer number (66585024).

Almost surely, 2^1212423425 is an apocalyptic number.

It is an amenable number.

1212423425 is a deficient number, since it is larger than the sum of its proper divisors (385617151).

1212423425 is a wasteful number, since it uses less digits than its factorization.

1212423425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11137 (or 11132 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 1212423425 is about 34819.8711226794. The cubic root of 1212423425 is about 1066.3131692666.

Adding to 1212423425 its reverse (5243242121), we get a palindrome (6455665546).

The spelling of 1212423425 in words is "one billion, two hundred twelve million, four hundred twenty-three thousand, four hundred twenty-five".