1205223525 has 54 divisors (see below), whose sum is σ = 2372827730. Its totient is φ = 584337600.

The previous prime is 1205223521. The next prime is 1205223527. The reversal of 1205223525 is 5253225021.

It can be written as a sum of positive squares in 3 ways, for example, as 363817476 + 841406049 = 19074^2 + 29007^2 .

It is not a de Polignac number, because 1205223525 - 2² = 1205223521 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205223521) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 5091 + ... + 49359.

Almost surely, 2^1205223525 is an apocalyptic number.

1205223525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1205223525 is a deficient number, since it is larger than the sum of its proper divisors (1167604205).

1205223525 is a wasteful number, since it uses less digits than its factorization.

1205223525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44307 (or 44288 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 1205223525 is about 34716.3293710611. The cubic root of 1205223525 is about 1064.1982327643.

Adding to 1205223525 its reverse (5253225021), we get a palindrome (6458448546).

The spelling of 1205223525 in words is "one billion, two hundred five million, two hundred twenty-three thousand, five hundred twenty-five".