261004 has 12 divisors (see below), whose sum is σ = 476784. Its totient is φ = 124784.

The previous prime is 260999. The next prime is 261011. The reversal of 261004 is 400162.

It is a pancake number, because a pancake can be divided into 261004 parts by 722 straight cuts.

It is a congruent number.

It is an unprimeable number.

261004 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1327 + ... + 1510.

It is an arithmetic number, because the mean of its divisors is an integer number (39732).

2²⁶¹⁰⁰⁴ is an apocalyptic number.

It is an amenable number.

261004 is a deficient number, since it is larger than the sum of its proper divisors (215780).

261004 is a wasteful number, since it uses less digits than its factorization.

261004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2864 (or 2862 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 261004 is about 510.8855057643. The cubic root of 261004 is about 63.9070917537.

Adding to 261004 its reverse (400162), we get a palindrome (661166).

The spelling of 261004 in words is "two hundred sixty-one thousand, four".