261902 has 8 divisors (see below), whose sum is σ = 416016. Its totient is φ = 123232.

The previous prime is 261887. The next prime is 261917. The reversal of 261902 is 209162.

261902 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (261887) and next prime (261917).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3818 + ... + 3885.

It is an arithmetic number, because the mean of its divisors is an integer number (52002).

2²⁶¹⁹⁰² is an apocalyptic number.

261902 is a deficient number, since it is larger than the sum of its proper divisors (154114).

261902 is a wasteful number, since it uses less digits than its factorization.

261902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7722.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 261902 is about 511.7636173078. The cubic root of 261902 is about 63.9802999263.

The spelling of 261902 in words is "two hundred sixty-one thousand, nine hundred two".