Search a number
-
+
61212 = 2235101
BaseRepresentation
bin1110111100011100
310002222010
432330130
53424322
61151220
7343314
oct167434
9102863
1061212
1141a98
122b510
1321b28
1418444
151320c
hexef1c

61212 has 12 divisors (see below), whose sum is σ = 142856. Its totient is φ = 20400.

The previous prime is 61211. The next prime is 61223. The reversal of 61212 is 21216.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (12) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 5101 = 61212 / (6 + 1 + 2 + 1 + 2).

It is a nude number because it is divisible by every one of its digits.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61211) 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, 2539 + ... + 2562.

261212 is an apocalyptic number.

It is an amenable number.

61212 is an abundant number, since it is smaller than the sum of its proper divisors (81644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71428).

61212 is a wasteful number, since it uses less digits than its factorization.

61212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5108 (or 5106 counting only the distinct ones).

The product of its digits is 24, while the sum is 12.

The square root of 61212 is about 247.4105899108. The cubic root of 61212 is about 39.4105222397.

Adding to 61212 its reverse (21216), we get a palindrome (82428).

The spelling of 61212 in words is "sixty-one thousand, two hundred twelve".

Divisors: 1 2 3 4 6 12 5101 10202 15303 20404 30606 61212