261344104 has 32 divisors (see below), whose sum is σ = 560563200. Its totient is φ = 111896640.

The previous prime is 261344089. The next prime is 261344119. The reversal of 261344104 is 401443162.

It is an interprime number because it is at equal distance from previous prime (261344089) and next prime (261344119).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89337 + ... + 92215.

It is an arithmetic number, because the mean of its divisors is an integer number (17517600).

Almost surely, 2^261344104 is an apocalyptic number.

It is an amenable number.

261344104 is an abundant number, since it is smaller than the sum of its proper divisors (299219096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261344104 is a wasteful number, since it uses less digits than its factorization.

261344104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4513 (or 4509 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 261344104 is about 16166.1406649825. The cubic root of 261344104 is about 639.3483797424.

Adding to 261344104 its reverse (401443162), we get a palindrome (662787266).

The spelling of 261344104 in words is "two hundred sixty-one million, three hundred forty-four thousand, one hundred four".