261485362 has 4 divisors (see below), whose sum is σ = 392228046. Its totient is φ = 130742680.

The previous prime is 261485351. The next prime is 261485363. The reversal of 261485362 is 263584162.

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

It can be written as a sum of positive squares in only one way, i.e., 202179961 + 59305401 = 14219^2 + 7701^2 .

It is not an unprimeable number, because it can be changed into a prime (261485363) by changing a digit.

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 as a sum of consecutive naturals, namely, 65371339 + ... + 65371342.

Almost surely, 2^261485362 is an apocalyptic number.

261485362 is a deficient number, since it is larger than the sum of its proper divisors (130742684).

261485362 is a wasteful number, since it uses less digits than its factorization.

261485362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130742683.

The product of its digits is 69120, while the sum is 37.

The square root of 261485362 is about 16170.5090210543. The cubic root of 261485362 is about 639.4635494942.

The spelling of 261485362 in words is "two hundred sixty-one million, four hundred eighty-five thousand, three hundred sixty-two".