123961149 has 24 divisors (see below), whose sum is σ = 202980960. Its totient is φ = 72267552.

The previous prime is 123961147. The next prime is 123961169. The reversal of 123961149 is 941169321.

It is a happy number.

123961149 is a `hidden beast` number, since 1 + 2 + 39 + 611 + 4 + 9 = 666.

It is not a de Polignac number, because 123961149 - 2¹ = 123961147 is a prime.

It is a super-2 number, since 2×123961149² = 30732732922800402, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123961141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25659 + ... + 30104.

It is an arithmetic number, because the mean of its divisors is an integer number (8457540).

Almost surely, 2^123961149 is an apocalyptic number.

123961149 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

123961149 is a deficient number, since it is larger than the sum of its proper divisors (79019811).

123961149 is a wasteful number, since it uses less digits than its factorization.

123961149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55801 (or 55798 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 123961149 is about 11133.7841276001. The cubic root of 123961149 is about 498.6110103217.

The spelling of 123961149 in words is "one hundred twenty-three million, nine hundred sixty-one thousand, one hundred forty-nine".