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64961 = 1319263
BaseRepresentation
bin1111110111000001
310022002222
433313001
54034321
61220425
7360251
oct176701
9108088
1064961
1144896
1231715
1323750
1419961
15143ab
hexfdc1

64961 has 8 divisors (see below), whose sum is σ = 73920. Its totient is φ = 56592.

The previous prime is 64951. The next prime is 64969. The reversal of 64961 is 16946.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-64961 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 64961.

It is not an unprimeable number, because it can be changed into a prime (64969) 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, 116 + ... + 378.

It is an arithmetic number, because the mean of its divisors is an integer number (9240).

264961 is an apocalyptic number.

It is an amenable number.

64961 is a deficient number, since it is larger than the sum of its proper divisors (8959).

64961 is a wasteful number, since it uses less digits than its factorization.

64961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295.

The product of its digits is 1296, while the sum is 26.

The square root of 64961 is about 254.8744789107. The cubic root of 64961 is about 40.1992145255.

It can be divided in two parts, 64 and 961, that multiplied together give a square (61504 = 2482).

The spelling of 64961 in words is "sixty-four thousand, nine hundred sixty-one".

Divisors: 1 13 19 247 263 3419 4997 64961