123171948 has 48 divisors (see below), whose sum is σ = 321149920. Its totient is φ = 40824000.

The previous prime is 123171943. The next prime is 123171949. The reversal of 123171948 is 849171321.

It is a happy number.

It is a super-2 number, since 2×123171948² = 30342657548229408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (123171943) 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, 16398 + ... + 22698.

Almost surely, 2^123171948 is an apocalyptic number.

123171948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123171948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160574960).

123171948 is an abundant number, since it is smaller than the sum of its proper divisors (197977972).

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

123171948 is a wasteful number, since it uses less digits than its factorization.

123171948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6495 (or 6487 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 123171948 is about 11098.2858135840. The cubic root of 123171948 is about 497.5506179821.

The spelling of 123171948 in words is "one hundred twenty-three million, one hundred seventy-one thousand, nine hundred forty-eight".