172607261 has 2 divisors, whose sum is σ = 172607262. Its totient is φ = 172607260.

The previous prime is 172607233. The next prime is 172607299. The reversal of 172607261 is 162706271.

172607261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102131236 + 70476025 = 10106^2 + 8395^2 .

It is a cyclic number.

It is not a de Polignac number, because 172607261 - 2¹⁴ = 172590877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172607231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86303630 + 86303631.

It is an arithmetic number, because the mean of its divisors is an integer number (86303631).

Almost surely, 2^172607261 is an apocalyptic number.

It is an amenable number.

172607261 is a deficient number, since it is larger than the sum of its proper divisors (1).

172607261 is an equidigital number, since it uses as much as digits as its factorization.

172607261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 172607261 is about 13138.0082584842. The cubic root of 172607261 is about 556.7834961422.

The spelling of 172607261 in words is "one hundred seventy-two million, six hundred seven thousand, two hundred sixty-one".