1213225126 has 32 divisors (see below), whose sum is σ = 1939334400. Its totient is φ = 567620640.

The previous prime is 1213225093. The next prime is 1213225151. The reversal of 1213225126 is 6215223121.

It is a self number, because there is not a number n which added to its sum of digits gives 1213225126.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1176231 + ... + 1177261.

It is an arithmetic number, because the mean of its divisors is an integer number (60604200).

Almost surely, 2^1213225126 is an apocalyptic number.

1213225126 is a deficient number, since it is larger than the sum of its proper divisors (726109274).

1213225126 is a wasteful number, since it uses less digits than its factorization.

1213225126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404.

The product of its digits is 1440, while the sum is 25.

The square root of 1213225126 is about 34831.3813392464. The cubic root of 1213225126 is about 1066.5481465753.

Adding to 1213225126 its reverse (6215223121), we get a palindrome (7428448247).

The spelling of 1213225126 in words is "one billion, two hundred thirteen million, two hundred twenty-five thousand, one hundred twenty-six".