170551261 has 2 divisors, whose sum is σ = 170551262. Its totient is φ = 170551260.

The previous prime is 170551231. The next prime is 170551273. The reversal of 170551261 is 162155071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168506361 + 2044900 = 12981^2 + 1430^2 .

It is a cyclic number.

It is not a de Polignac number, because 170551261 - 2¹⁵ = 170518493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170551231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85275630 + 85275631.

It is an arithmetic number, because the mean of its divisors is an integer number (85275631).

Almost surely, 2^170551261 is an apocalyptic number.

It is an amenable number.

170551261 is a deficient number, since it is larger than the sum of its proper divisors (1).

170551261 is an equidigital number, since it uses as much as digits as its factorization.

170551261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 170551261 is about 13059.5275948252. The cubic root of 170551261 is about 554.5639634445.

The spelling of 170551261 in words is "one hundred seventy million, five hundred fifty-one thousand, two hundred sixty-one".