1320707725 has 24 divisors (see below), whose sum is σ = 1764029952. Its totient is φ = 978014400.

The previous prime is 1320707723. The next prime is 1320707749. The reversal of 1320707725 is 5277070231.

It is a happy number.

It is not a de Polignac number, because 1320707725 - 2¹ = 1320707723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320707723) 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, 19222 + ... + 54871.

It is an arithmetic number, because the mean of its divisors is an integer number (73501248).

Almost surely, 2^1320707725 is an apocalyptic number.

It is an amenable number.

1320707725 is a deficient number, since it is larger than the sum of its proper divisors (443322227).

1320707725 is a wasteful number, since it uses less digits than its factorization.

1320707725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74157 (or 74152 counting only the distinct ones).

The product of its (nonzero) digits is 20580, while the sum is 34.

The square root of 1320707725 is about 36341.5426887742. The cubic root of 1320707725 is about 1097.1573226677.

Adding to 1320707725 its reverse (5277070231), we get a palindrome (6597777956).

The spelling of 1320707725 in words is "one billion, three hundred twenty million, seven hundred seven thousand, seven hundred twenty-five".