123047550 has 72 divisors (see below), whose sum is σ = 332136480. Its totient is φ = 32659200.

The previous prime is 123047549. The next prime is 123047563. The reversal of 123047550 is 55740321.

It is a happy number.

It is a super-2 number, since 2×123047550² = 30281399122005000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 121446 + ... + 122454.

Almost surely, 2^123047550 is an apocalyptic number.

123047550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 123047550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166068240).

123047550 is an abundant number, since it is smaller than the sum of its proper divisors (209088930).

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

123047550 is a wasteful number, since it uses less digits than its factorization.

123047550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298 (or 1290 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 123047550 is about 11092.6800188232. The cubic root of 123047550 is about 497.3830604842.

Adding to 123047550 its reverse (55740321), we get a palindrome (178787871).

The spelling of 123047550 in words is "one hundred twenty-three million, forty-seven thousand, five hundred fifty".