1215204325 has 12 divisors (see below), whose sum is σ = 1507438240. Its totient is φ = 971786160.

The previous prime is 1215204323. The next prime is 1215204349. The reversal of 1215204325 is 5234025121.

It is not a de Polignac number, because 1215204325 - 2¹ = 1215204323 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 1215204325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215204323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69082 + ... + 84868.

Almost surely, 2^1215204325 is an apocalyptic number.

It is an amenable number.

1215204325 is a deficient number, since it is larger than the sum of its proper divisors (292233915).

1215204325 is a wasteful number, since it uses less digits than its factorization.

1215204325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18876 (or 18871 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1215204325 is about 34859.7809086632. The cubic root of 1215204325 is about 1067.1278038152.

Adding to 1215204325 its reverse (5234025121), we get a palindrome (6449229446).

The spelling of 1215204325 in words is "one billion, two hundred fifteen million, two hundred four thousand, three hundred twenty-five".