165711425 has 24 divisors (see below), whose sum is σ = 228949632. Its totient is φ = 117944000.

The previous prime is 165711421. The next prime is 165711439. The reversal of 165711425 is 524117561.

It is not a de Polignac number, because 165711425 - 2² = 165711421 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165711391 and 165711400.

It is not an unprimeable number, because it can be changed into a prime (165711421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6515 + ... + 19335.

It is an arithmetic number, because the mean of its divisors is an integer number (9539568).

Almost surely, 2^165711425 is an apocalyptic number.

It is an amenable number.

165711425 is a deficient number, since it is larger than the sum of its proper divisors (63238207).

165711425 is a wasteful number, since it uses less digits than its factorization.

165711425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12889 (or 12884 counting only the distinct ones).

The product of its digits is 8400, while the sum is 32.

The square root of 165711425 is about 12872.8949735481. The cubic root of 165711425 is about 549.2678135896.

Adding to 165711425 its reverse (524117561), we get a palindrome (689828986).

The spelling of 165711425 in words is "one hundred sixty-five million, seven hundred eleven thousand, four hundred twenty-five".