123145213 has 16 divisors (see below), whose sum is σ = 135432000. Its totient is φ = 111549312.

The previous prime is 123145193. The next prime is 123145259. The reversal of 123145213 is 312541321.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123145213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123145273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39993 + ... + 42961.

It is an arithmetic number, because the mean of its divisors is an integer number (8464500).

Almost surely, 2^123145213 is an apocalyptic number.

It is an amenable number.

123145213 is a deficient number, since it is larger than the sum of its proper divisors (12286787).

123145213 is a wasteful number, since it uses less digits than its factorization.

123145213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3084.

The product of its digits is 720, while the sum is 22.

The square root of 123145213 is about 11097.0812829320. The cubic root of 123145213 is about 497.5146168782.

Adding to 123145213 its reverse (312541321), we get a palindrome (435686534).

The spelling of 123145213 in words is "one hundred twenty-three million, one hundred forty-five thousand, two hundred thirteen".