1205122025 has 24 divisors (see below), whose sum is σ = 1575271200. Its totient is φ = 912038400.

The previous prime is 1205122021. The next prime is 1205122043. The reversal of 1205122025 is 5202215021.

It is a happy number.

It is not a de Polignac number, because 1205122025 - 2² = 1205122021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1205121988 and 1205122006.

It is not an unprimeable number, because it can be changed into a prime (1205122021) 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, 439910 + ... + 442640.

It is an arithmetic number, because the mean of its divisors is an integer number (65636300).

Almost surely, 2^1205122025 is an apocalyptic number.

It is an amenable number.

1205122025 is a deficient number, since it is larger than the sum of its proper divisors (370149175).

1205122025 is a wasteful number, since it uses less digits than its factorization.

1205122025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3689 (or 3684 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1205122025 is about 34714.8674921855. The cubic root of 1205122025 is about 1064.1683574892.

Adding to 1205122025 its reverse (5202215021), we get a palindrome (6407337046).

The spelling of 1205122025 in words is "one billion, two hundred five million, one hundred twenty-two thousand, twenty-five".