1225124025 has 24 divisors (see below), whose sum is σ = 2035164384. Its totient is φ = 650294400.

The previous prime is 1225123997. The next prime is 1225124027. The reversal of 1225124025 is 5204215221.

It is not a de Polignac number, because 1225124025 - 2⁶ = 1225123961 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1225123986 and 1225124004.

It is not an unprimeable number, because it can be changed into a prime (1225124027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22884 + ... + 54533.

It is an arithmetic number, because the mean of its divisors is an integer number (84798516).

Almost surely, 2^1225124025 is an apocalyptic number.

1225124025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1225124025 is a deficient number, since it is larger than the sum of its proper divisors (810040359).

1225124025 is a wasteful number, since it uses less digits than its factorization.

1225124025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77641 (or 77636 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1225124025 is about 35001.7717408705. The cubic root of 1225124025 is about 1070.0235896043.

Adding to 1225124025 its reverse (5204215221), we get a palindrome (6429339246).

It can be divided in two parts, 1225 and 124025, that added together give a triangular number (125250 = T₅₀₀).

The spelling of 1225124025 in words is "one billion, two hundred twenty-five million, one hundred twenty-four thousand, twenty-five".