123442152 has 16 divisors (see below), whose sum is σ = 308605440. Its totient is φ = 41147376.

The previous prime is 123442139. The next prime is 123442153. The reversal of 123442152 is 251244321.

It is a super-2 number, since 2×123442152² = 30475929780782208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 5143423 = 123442152 / (1 + 2 + 3 + 4 + 4 + 2 + 1 + 5 + 2).

It is not an unprimeable number, because it can be changed into a prime (123442153) 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, 2571688 + ... + 2571735.

It is an arithmetic number, because the mean of its divisors is an integer number (19287840).

Almost surely, 2^123442152 is an apocalyptic number.

123442152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123442152 is an abundant number, since it is smaller than the sum of its proper divisors (185163288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123442152 is a wasteful number, since it uses less digits than its factorization.

123442152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5143432 (or 5143428 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 123442152 is about 11110.4523760286. The cubic root of 123442152 is about 497.9141801439.

Adding to 123442152 its reverse (251244321), we get a palindrome (374686473).

The spelling of 123442152 in words is "one hundred twenty-three million, four hundred forty-two thousand, one hundred fifty-two".