1225644125 has 16 divisors (see below), whose sum is σ = 1596112128. Its totient is φ = 937882000.

The previous prime is 1225644109. The next prime is 1225644131. The reversal of 1225644125 is 5214465221.

1225644125 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1225644125 - 2⁴ = 1225644109 is a prime.

It is a super-2 number, since 2×1225644125² = 3004407042294031250, 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 = 1225644091 and 1225644100.

It is a congruent number.

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, 210281 + ... + 216030.

It is an arithmetic number, because the mean of its divisors is an integer number (99757008).

Almost surely, 2^1225644125 is an apocalyptic number.

It is an amenable number.

1225644125 is a deficient number, since it is larger than the sum of its proper divisors (370468003).

1225644125 is an equidigital number, since it uses as much as digits as its factorization.

1225644125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426349 (or 426339 counting only the distinct ones).

The product of its digits is 19200, while the sum is 32.

The square root of 1225644125 is about 35009.2005764199. The cubic root of 1225644125 is about 1070.1749866665.

The spelling of 1225644125 in words is "one billion, two hundred twenty-five million, six hundred forty-four thousand, one hundred twenty-five".