123949512 has 24 divisors (see below), whose sum is σ = 335696790. Its totient is φ = 41316480.

The previous prime is 123949477. The next prime is 123949537. The reversal of 123949512 is 215949321.

It can be written as a sum of positive squares in only one way, i.e., 74753316 + 49196196 = 8646^2 + 7014^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 860689 + ... + 860832.

Almost surely, 2^123949512 is an apocalyptic number.

123949512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123949512 is an abundant number, since it is smaller than the sum of its proper divisors (211747278).

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

123949512 is a wasteful number, since it uses less digits than its factorization.

123949512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721533 (or 1721526 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 123949512 is about 11133.2615167344. The cubic root of 123949512 is about 498.5954072666.

The spelling of 123949512 in words is "one hundred twenty-three million, nine hundred forty-nine thousand, five hundred twelve".