146172861 has 12 divisors (see below), whose sum is σ = 211360188. Its totient is φ = 97346304.

The previous prime is 146172857. The next prime is 146172881. The reversal of 146172861 is 168271641.

It is a happy number.

146172861 is a `hidden beast` number, since 14 + 617 + 28 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 367236 + 145805625 = 606^2 + 12075^2 .

It is not a de Polignac number, because 146172861 - 2² = 146172857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146172811) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1101 + ... + 17133.

It is an arithmetic number, because the mean of its divisors is an integer number (17613349).

Almost surely, 2^146172861 is an apocalyptic number.

It is an amenable number.

146172861 is a deficient number, since it is larger than the sum of its proper divisors (65187327).

146172861 is a wasteful number, since it uses less digits than its factorization.

146172861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17052 (or 17049 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 146172861 is about 12090.1968966597. The cubic root of 146172861 is about 526.7714744060.

The spelling of 146172861 in words is "one hundred forty-six million, one hundred seventy-two thousand, eight hundred sixty-one".