165142025 has 12 divisors (see below), whose sum is σ = 205030032. Its totient is φ = 131949840.

The previous prime is 165142013. The next prime is 165142039. The reversal of 165142025 is 520241561.

It is not a de Polignac number, because 165142025 - 2¹⁶ = 165076489 is a prime.

It is a super-2 number, since 2×165142025² = 54543776842201250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165141985 and 165142003.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19034 + ... + 26316.

It is an arithmetic number, because the mean of its divisors is an integer number (17085836).

Almost surely, 2^165142025 is an apocalyptic number.

It is an amenable number.

165142025 is a deficient number, since it is larger than the sum of its proper divisors (39888007).

165142025 is an equidigital number, since it uses as much as digits as its factorization.

165142025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8200 (or 8195 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 165142025 is about 12850.7597051692. The cubic root of 165142025 is about 548.6379797389.

Adding to 165142025 its reverse (520241561), we get a palindrome (685383586).

The spelling of 165142025 in words is "one hundred sixty-five million, one hundred forty-two thousand, twenty-five".