1025320165 has 16 divisors (see below), whose sum is σ = 1274188608. Its totient is φ = 791513856.

The previous prime is 1025320129. The next prime is 1025320171. The reversal of 1025320165 is 5610235201.

It is a cyclic number.

It is not a de Polignac number, because 1025320165 - 2⁹ = 1025319653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10884 + ... + 46573.

It is an arithmetic number, because the mean of its divisors is an integer number (79636788).

Almost surely, 2^1025320165 is an apocalyptic number.

It is an amenable number.

1025320165 is a deficient number, since it is larger than the sum of its proper divisors (248868443).

1025320165 is an equidigital number, since it uses as much as digits as its factorization.

1025320165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57588.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1025320165 is about 32020.6209340169. The cubic root of 1025320165 is about 1008.3698059040.

Adding to 1025320165 its reverse (5610235201), we get a palindrome (6635555366).

The spelling of 1025320165 in words is "one billion, twenty-five million, three hundred twenty thousand, one hundred sixty-five".