168457261 has 16 divisors (see below), whose sum is σ = 195022080. Its totient is φ = 142531200.

The previous prime is 168457241. The next prime is 168457279. The reversal of 168457261 is 162754861.

It is not a de Polignac number, because 168457261 - 2⁹ = 168456749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168457231) 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, 207825 + ... + 208633.

It is an arithmetic number, because the mean of its divisors is an integer number (12188880).

Almost surely, 2^168457261 is an apocalyptic number.

It is an amenable number.

168457261 is a deficient number, since it is larger than the sum of its proper divisors (26564819).

168457261 is a wasteful number, since it uses less digits than its factorization.

168457261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164.

The product of its digits is 80640, while the sum is 40.

The square root of 168457261 is about 12979.1086365744. The cubic root of 168457261 is about 552.2849962278.

The spelling of 168457261 in words is "one hundred sixty-eight million, four hundred fifty-seven thousand, two hundred sixty-one".