261673130 has 32 divisors (see below), whose sum is σ = 498389760. Its totient is φ = 98642880.

The previous prime is 261673091. The next prime is 261673133. The reversal of 261673130 is 31376162.

261673130 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 261673093 and 261673102.

It is not an unprimeable number, because it can be changed into a prime (261673133) 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, 33935 + ... + 40925.

It is an arithmetic number, because the mean of its divisors is an integer number (15574680).

Almost surely, 2^261673130 is an apocalyptic number.

261673130 is a deficient number, since it is larger than the sum of its proper divisors (236716630).

261673130 is a wasteful number, since it uses less digits than its factorization.

261673130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7214.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 261673130 is about 16176.3138569947. The cubic root of 261673130 is about 639.6165753488.

The spelling of 261673130 in words is "two hundred sixty-one million, six hundred seventy-three thousand, one hundred thirty".