213746 has 8 divisors (see below), whose sum is σ = 345324. Its totient is φ = 98640.

The previous prime is 213737. The next prime is 213751. The reversal of 213746 is 647312.

213746 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 212521 + 1225 = 461^2 + 35^2 .

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

It is an unprimeable number.

213746 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4085 + ... + 4136.

2²¹³⁷⁴⁶ is an apocalyptic number.

213746 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

213746 is a deficient number, since it is larger than the sum of its proper divisors (131578).

213746 is a wasteful number, since it uses less digits than its factorization.

213746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8236.

The product of its digits is 1008, while the sum is 23.

The square root of 213746 is about 462.3267242979. The cubic root of 213746 is about 59.7905661043.

It can be divided in two parts, 213 and 746, that added together give a palindrome (959).

The spelling of 213746 in words is "two hundred thirteen thousand, seven hundred forty-six".