123402245 has 16 divisors (see below), whose sum is σ = 162656640. Its totient is φ = 89457984.

The previous prime is 123402241. The next prime is 123402263. The reversal of 123402245 is 542204321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 123402245 - 2² = 123402241 is a prime.

It is a super-2 number, since 2×123402245² = 30456228142080050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 123402245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123402241) 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, 26054 + ... + 30423.

It is an arithmetic number, because the mean of its divisors is an integer number (10166040).

Almost surely, 2^123402245 is an apocalyptic number.

It is an amenable number.

123402245 is a deficient number, since it is larger than the sum of its proper divisors (39254395).

123402245 is a wasteful number, since it uses less digits than its factorization.

123402245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56524.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 123402245 is about 11108.6563093832. The cubic root of 123402245 is about 497.8605182937.

Adding to 123402245 its reverse (542204321), we get a palindrome (665606566).

The spelling of 123402245 in words is "one hundred twenty-three million, four hundred two thousand, two hundred forty-five".