123542213 has 8 divisors (see below), whose sum is σ = 131323032. Its totient is φ = 115818496.

The previous prime is 123542203. The next prime is 123542231. The reversal of 123542213 is 312245321.

It can be written as a sum of positive squares in 4 ways, for example, as 64529089 + 59013124 = 8033^2 + 7682^2 .

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 2^k-123542213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123542203) 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, 9770 + ... + 18507.

It is an arithmetic number, because the mean of its divisors is an integer number (16415379).

Almost surely, 2^123542213 is an apocalyptic number.

It is an amenable number.

123542213 is a deficient number, since it is larger than the sum of its proper divisors (7780819).

123542213 is a wasteful number, since it uses less digits than its factorization.

123542213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28551.

The product of its digits is 1440, while the sum is 23.

The square root of 123542213 is about 11114.9544758402. The cubic root of 123542213 is about 498.0486785962.

Adding to 123542213 its reverse (312245321), we get a palindrome (435787534).

The spelling of 123542213 in words is "one hundred twenty-three million, five hundred forty-two thousand, two hundred thirteen".