261941 has 4 divisors (see below), whose sum is σ = 263712. Its totient is φ = 260172.

The previous prime is 261917. The next prime is 261959. The reversal of 261941 is 149162.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261941 is a prime.

It is a super-2 number, since 2×261941² = 137226174962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641 + ... + 966.

It is an arithmetic number, because the mean of its divisors is an integer number (65928).

2²⁶¹⁹⁴¹ is an apocalyptic number.

It is an amenable number.

261941 is a deficient number, since it is larger than the sum of its proper divisors (1771).

261941 is a wasteful number, since it uses less digits than its factorization.

261941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770.

The product of its digits is 432, while the sum is 23.

The square root of 261941 is about 511.8017194188. The cubic root of 261941 is about 63.9834755516.

The spelling of 261941 in words is "two hundred sixty-one thousand, nine hundred forty-one".