164252261 has 2 divisors, whose sum is σ = 164252262. Its totient is φ = 164252260.

The previous prime is 164252237. The next prime is 164252279. The reversal of 164252261 is 162252461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124322500 + 39929761 = 11150^2 + 6319^2 .

It is a cyclic number.

It is not a de Polignac number, because 164252261 - 2⁶ = 164252197 is a prime.

It is a super-2 number, since 2×164252261² = 53957610487224242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164252281) by changing a digit.

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 as a sum of consecutive naturals, namely, 82126130 + 82126131.

It is an arithmetic number, because the mean of its divisors is an integer number (82126131).

Almost surely, 2^164252261 is an apocalyptic number.

It is an amenable number.

164252261 is a deficient number, since it is larger than the sum of its proper divisors (1).

164252261 is an equidigital number, since it uses as much as digits as its factorization.

164252261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 29.

The square root of 164252261 is about 12816.0938276840. The cubic root of 164252261 is about 547.6508745113.

The spelling of 164252261 in words is "one hundred sixty-four million, two hundred fifty-two thousand, two hundred sixty-one".