164256025 has 6 divisors (see below), whose sum is σ = 203677502. Its totient is φ = 131404800.

The previous prime is 164256019. The next prime is 164256031. The reversal of 164256025 is 520652461.

It is an interprime number because it is at equal distance from previous prime (164256019) and next prime (164256031).

It can be written as a sum of positive squares in 3 ways, for example, as 51322896 + 112933129 = 7164^2 + 10627^2 .

It is not a de Polignac number, because 164256025 - 2²¹ = 162158873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3285096 + ... + 3285145.

Almost surely, 2^164256025 is an apocalyptic number.

It is an amenable number.

164256025 is a deficient number, since it is larger than the sum of its proper divisors (39421477).

164256025 is an equidigital number, since it uses as much as digits as its factorization.

164256025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6570251 (or 6570246 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 164256025 is about 12816.2406734580. The cubic root of 164256025 is about 547.6550577964.

The spelling of 164256025 in words is "one hundred sixty-four million, two hundred fifty-six thousand, twenty-five".