1225512123 has 8 divisors (see below), whose sum is σ = 1782563136. Its totient is φ = 742734600.

The previous prime is 1225512121. The next prime is 1225512139. The reversal of 1225512123 is 3212155221.

1225512123 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1225512123 - 2¹ = 1225512121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1225512093 and 1225512102.

It is not an unprimeable number, because it can be changed into a prime (1225512121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18568333 + ... + 18568398.

It is an arithmetic number, because the mean of its divisors is an integer number (222820392).

Almost surely, 2^1225512123 is an apocalyptic number.

1225512123 is a deficient number, since it is larger than the sum of its proper divisors (557051013).

1225512123 is a wasteful number, since it uses less digits than its factorization.

1225512123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37136745.

The product of its digits is 1200, while the sum is 24.

The square root of 1225512123 is about 35007.3152783815. The cubic root of 1225512123 is about 1070.1365659679.

Adding to 1225512123 its reverse (3212155221), we get a palindrome (4437667344).

The spelling of 1225512123 in words is "one billion, two hundred twenty-five million, five hundred twelve thousand, one hundred twenty-three".