261460445 has 4 divisors (see below), whose sum is σ = 313752540. Its totient is φ = 209168352.

The previous prime is 261460427. The next prime is 261460471. The reversal of 261460445 is 544064162.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 147355321 + 114105124 = 12139^2 + 10682^2 .

It is a cyclic number.

It is not a de Polignac number, because 261460445 - 2¹⁶ = 261394909 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26146040 + ... + 26146049.

It is an arithmetic number, because the mean of its divisors is an integer number (78438135).

Almost surely, 2^261460445 is an apocalyptic number.

It is an amenable number.

261460445 is a deficient number, since it is larger than the sum of its proper divisors (52292095).

261460445 is an equidigital number, since it uses as much as digits as its factorization.

261460445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52292094.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 261460445 is about 16169.7385569464. The cubic root of 261460445 is about 639.4432373063.

The spelling of 261460445 in words is "two hundred sixty-one million, four hundred sixty thousand, four hundred forty-five".