123856461 has 12 divisors (see below), whose sum is σ = 179814492. Its totient is φ = 82150656.

The previous prime is 123856429. The next prime is 123856463. The reversal of 123856461 is 164658321.

It is a happy number.

123856461 is a `hidden beast` number, since 1 + 2 + 3 + 8 + 5 + 646 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 91298025 + 32558436 = 9555^2 + 5706^2 .

It is not a de Polignac number, because 123856461 - 2⁵ = 123856429 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123856463) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33156 + ... + 36701.

It is an arithmetic number, because the mean of its divisors is an integer number (14984541).

Almost surely, 2^123856461 is an apocalyptic number.

It is an amenable number.

123856461 is a deficient number, since it is larger than the sum of its proper divisors (55958031).

123856461 is a wasteful number, since it uses less digits than its factorization.

123856461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70060 (or 70057 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 123856461 is about 11129.0817680526. The cubic root of 123856461 is about 498.4706080234.

The spelling of 123856461 in words is "one hundred twenty-three million, eight hundred fifty-six thousand, four hundred sixty-one".