123540213 has 8 divisors (see below), whose sum is σ = 167040576. Its totient is φ = 81200000.

The previous prime is 123540187. The next prime is 123540269. The reversal of 123540213 is 312045321.

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

It is a cyclic number.

It is not a de Polignac number, because 123540213 - 2⁵ = 123540181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123540213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123540293) 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, 289788 + ... + 290213.

It is an arithmetic number, because the mean of its divisors is an integer number (20880072).

Almost surely, 2^123540213 is an apocalyptic number.

It is an amenable number.

123540213 is a deficient number, since it is larger than the sum of its proper divisors (43500363).

123540213 is an equidigital number, since it uses as much as digits as its factorization.

123540213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580075.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 123540213 is about 11114.8645065966. The cubic root of 123540213 is about 498.0459909784.

Adding to 123540213 its reverse (312045321), we get a palindrome (435585534).

It can be divided in two parts, 123540 and 213, that added together give a triangular number (123753 = T₄₉₇).

The spelling of 123540213 in words is "one hundred twenty-three million, five hundred forty thousand, two hundred thirteen".