245166261 has 16 divisors (see below), whose sum is σ = 340838400. Its totient is φ = 156558528.

The previous prime is 245166191. The next prime is 245166277. The reversal of 245166261 is 162661542.

It is not a de Polignac number, because 245166261 - 2⁹ = 245165749 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245166281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46 + ... + 22143.

It is an arithmetic number, because the mean of its divisors is an integer number (21302400).

Almost surely, 2^245166261 is an apocalyptic number.

It is an amenable number.

245166261 is a deficient number, since it is larger than the sum of its proper divisors (95672139).

245166261 is a wasteful number, since it uses less digits than its factorization.

245166261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22348.

The product of its digits is 17280, while the sum is 33.

The square root of 245166261 is about 15657.7859545978. The cubic root of 245166261 is about 625.8739866527.

The spelling of 245166261 in words is "two hundred forty-five million, one hundred sixty-six thousand, two hundred sixty-one".