1225124120 has 32 divisors (see below), whose sum is σ = 3007123920. Its totient is φ = 445499520.

The previous prime is 1225124119. The next prime is 1225124149. The reversal of 1225124120 is 214215221.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1225124092 and 1225124101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1391747 + ... + 1392626.

Almost surely, 2^1225124120 is an apocalyptic number.

1225124120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225124120 is an abundant number, since it is smaller than the sum of its proper divisors (1781999800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225124120 is a wasteful number, since it uses less digits than its factorization.

1225124120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2784395 (or 2784391 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1225124120 is about 35001.7730979446. The cubic root of 1225124120 is about 1070.0236172619.

Adding to 1225124120 its reverse (214215221), we get a palindrome (1439339341).

The spelling of 1225124120 in words is "one billion, two hundred twenty-five million, one hundred twenty-four thousand, one hundred twenty".