123197542 has 8 divisors (see below), whose sum is σ = 199011456. Its totient is φ = 56860392.

The previous prime is 123197489. The next prime is 123197549. The reversal of 123197542 is 245791321.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 123197498 and 123197507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123197549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2369158 + ... + 2369209.

It is an arithmetic number, because the mean of its divisors is an integer number (24876432).

Almost surely, 2^123197542 is an apocalyptic number.

123197542 is a deficient number, since it is larger than the sum of its proper divisors (75813914).

123197542 is a wasteful number, since it uses less digits than its factorization.

123197542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4738382.

The product of its digits is 15120, while the sum is 34.

The square root of 123197542 is about 11099.4388146428. The cubic root of 123197542 is about 497.5850777456.

The spelling of 123197542 in words is "one hundred twenty-three million, one hundred ninety-seven thousand, five hundred forty-two".