146868561 has 48 divisors (see below), whose sum is σ = 249859584. Its totient is φ = 81395712.

The previous prime is 146868539. The next prime is 146868569. The reversal of 146868561 is 165868641.

146868561 is a `hidden beast` number, since 1 + 4 + 6 + 86 + 8 + 561 = 666.

It is not a de Polignac number, because 146868561 - 2⁶ = 146868497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (146868569) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 571345 + ... + 571601.

It is an arithmetic number, because the mean of its divisors is an integer number (5205408).

Almost surely, 2^146868561 is an apocalyptic number.

It is an amenable number.

146868561 is a deficient number, since it is larger than the sum of its proper divisors (102991023).

146868561 is a wasteful number, since it uses less digits than its factorization.

146868561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510 (or 507 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 146868561 is about 12118.9339877730. The cubic root of 146868561 is about 527.6058633168.

The spelling of 146868561 in words is "one hundred forty-six million, eight hundred sixty-eight thousand, five hundred sixty-one".