123242895 has 24 divisors (see below), whose sum is σ = 220989600. Its totient is φ = 63462336.

The previous prime is 123242879. The next prime is 123242897. The reversal of 123242895 is 598242321.

It is a happy number.

It is not a de Polignac number, because 123242895 - 2⁴ = 123242879 is a prime.

It is a super-2 number, since 2×123242895² = 30377622335962050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123242897) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45915 + ... + 48524.

It is an arithmetic number, because the mean of its divisors is an integer number (9207900).

Almost surely, 2^123242895 is an apocalyptic number.

123242895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123242895 is a deficient number, since it is larger than the sum of its proper divisors (97746705).

123242895 is a wasteful number, since it uses less digits than its factorization.

123242895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94479 (or 94476 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 123242895 is about 11101.4816578689. The cubic root of 123242895 is about 497.6461293083.

The spelling of 123242895 in words is "one hundred twenty-three million, two hundred forty-two thousand, eight hundred ninety-five".