1225123545 has 16 divisors (see below), whose sum is σ = 1961271360. Its totient is φ = 653041344.

The previous prime is 1225123519. The next prime is 1225123579. The reversal of 1225123545 is 5453215221.

It is not a de Polignac number, because 1225123545 - 2⁶ = 1225123481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7191 + ... + 50019.

It is an arithmetic number, because the mean of its divisors is an integer number (122579460).

Almost surely, 2^1225123545 is an apocalyptic number.

1225123545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1225123545 is a deficient number, since it is larger than the sum of its proper divisors (736147815).

1225123545 is a wasteful number, since it uses less digits than its factorization.

1225123545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44744.

The product of its digits is 12000, while the sum is 30.

The square root of 1225123545 is about 35001.7648840741. The cubic root of 1225123545 is about 1070.0234498602.

Adding to 1225123545 its reverse (5453215221), we get a palindrome (6678338766).

The spelling of 1225123545 in words is "one billion, two hundred twenty-five million, one hundred twenty-three thousand, five hundred forty-five".