261016125 has 32 divisors (see below), whose sum is σ = 448361472. Its totient is φ = 134712000.

The previous prime is 261016109. The next prime is 261016141. The reversal of 261016125 is 521610162.

It is an interprime number because it is at equal distance from previous prime (261016109) and next prime (261016141).

It is not a de Polignac number, because 261016125 - 2⁴ = 261016109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261016095 and 261016104.

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 31 ways as a sum of consecutive naturals, for example, 399 + ... + 22851.

It is an arithmetic number, because the mean of its divisors is an integer number (14011296).

Almost surely, 2^261016125 is an apocalyptic number.

261016125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

261016125 is a deficient number, since it is larger than the sum of its proper divisors (187345347).

261016125 is a wasteful number, since it uses less digits than its factorization.

261016125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22502 (or 22492 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 261016125 is about 16155.9934699170. The cubic root of 261016125 is about 639.0808134449.

Adding to 261016125 its reverse (521610162), we get a palindrome (782626287).

The spelling of 261016125 in words is "two hundred sixty-one million, sixteen thousand, one hundred twenty-five".