261148 has 6 divisors (see below), whose sum is σ = 457016. Its totient is φ = 130572.

The previous prime is 261127. The next prime is 261167. The reversal of 261148 is 841162.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

261148 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32640 + ... + 32647.

2²⁶¹¹⁴⁸ is an apocalyptic number.

It is an amenable number.

261148 is a deficient number, since it is larger than the sum of its proper divisors (195868).

261148 is a wasteful number, since it uses less digits than its factorization.

261148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65291 (or 65289 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

The square root of 261148 is about 511.0264181038. The cubic root of 261148 is about 63.9188424412.

The spelling of 261148 in words is "two hundred sixty-one thousand, one hundred forty-eight".