261471325 has 12 divisors (see below), whose sum is σ = 327437748. Its totient is φ = 207104000.

The previous prime is 261471323. The next prime is 261471361. The reversal of 261471325 is 523174162.

It can be written as a sum of positive squares in 6 ways, for example, as 12652249 + 248819076 = 3557^2 + 15774^2 .

It is not a de Polignac number, because 261471325 - 2¹ = 261471323 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 (261471323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49252 + ... + 54301.

It is an arithmetic number, because the mean of its divisors is an integer number (27286479).

Almost surely, 2^261471325 is an apocalyptic number.

261471325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

261471325 is a deficient number, since it is larger than the sum of its proper divisors (65966423).

261471325 is a wasteful number, since it uses less digits than its factorization.

261471325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103664 (or 103659 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 261471325 is about 16170.0749843654. The cubic root of 261471325 is about 639.4521067753.

It can be divided in two parts, 26147 and 1325, that added together give a palindrome (27472).

The spelling of 261471325 in words is "two hundred sixty-one million, four hundred seventy-one thousand, three hundred twenty-five".