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49212 = 22321367

49212 has 18 divisors (see below), whose sum is σ = 124488. Its totient is φ = 16392.

The previous prime is 49211. The next prime is 49223. The reversal of 49212 is 21294.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is an Ulam number.

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

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 648 + ... + 719.

It is an arithmetic number, because the mean of its divisors is an integer number (6916).

249212 is an apocalyptic number.

It is an amenable number.

49212 is an abundant number, since it is smaller than the sum of its proper divisors (75276).

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

49212 is a wasteful number, since it uses less digits than its factorization.

49212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377 (or 1372 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 49212 is about 221.8377785680. The cubic root of 49212 is about 36.6457548343.

Subtracting from 49212 its sum of digits (18), we obtain a palindrome (49194).

It can be divided in two parts, 4 and 9212, that added together give a square (9216 = 962).

The spelling of 49212 in words is "forty-nine thousand, two hundred twelve".

Divisors: 1 2 3 4 6 9 12 18 36 1367 2734 4101 5468 8202 12303 16404 24606 49212