1320025525 has 24 divisors (see below), whose sum is σ = 2014565504. Its totient is φ = 835531200.

The previous prime is 1320025519. The next prime is 1320025529. The reversal of 1320025525 is 5255200231.

It is a happy number.

It is not a de Polignac number, because 1320025525 - 2³ = 1320025517 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 1320025525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320025529) 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, 287841 + ... + 292390.

Almost surely, 2^1320025525 is an apocalyptic number.

It is an amenable number.

1320025525 is a deficient number, since it is larger than the sum of its proper divisors (694539979).

1320025525 is a wasteful number, since it uses less digits than its factorization.

1320025525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580261 (or 580256 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 1320025525 is about 36332.1555237231. The cubic root of 1320025525 is about 1096.9683811322.

Adding to 1320025525 its reverse (5255200231), we get a palindrome (6575225756).

The spelling of 1320025525 in words is "one billion, three hundred twenty million, twenty-five thousand, five hundred twenty-five".