Search a number
40261 = 1319163

40261 has 8 divisors (see below), whose sum is σ = 45920. Its totient is φ = 34992.

The previous prime is 40253. The next prime is 40277. The reversal of 40261 is 16204.

Adding to 40261 its reverse (16204), we get a palindrome (56465).

It can be divided in two parts, 40 and 261, that multiplied together give a triangular number (10440 = T144).

40261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a 7-Lehmer number, since φ(40261) divides (40261-1)7.

It is a cyclic number.

It is not a de Polignac number, because 40261 - 23 = 40253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166 + ... + 328.

It is an arithmetic number, because the mean of its divisors is an integer number (5740).

240261 is an apocalyptic number.

It is an amenable number.

40261 is a deficient number, since it is larger than the sum of its proper divisors (5659).

40261 is a wasteful number, since it uses less digits than its factorization.

40261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195.

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

The square root of 40261 is about 200.6514390679. The cubic root of 40261 is about 34.2737416860.

The spelling of 40261 in words is "forty thousand, two hundred sixty-one".

Divisors: 1 13 19 163 247 2119 3097 40261