146501681 has 4 divisors (see below), whose sum is σ = 146549364. Its totient is φ = 146454000.

The previous prime is 146501657. The next prime is 146501683. The reversal of 146501681 is 186105641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 186105641 = 929 ⋅200329.

It can be written as a sum of positive squares in 2 ways, for example, as 43296400 + 103205281 = 6580^2 + 10159^2 .

It is a cyclic number.

It is not a de Polignac number, because 146501681 - 2⁶ = 146501617 is a prime.

It is a super-2 number, since 2×146501681² = 42925485071651522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146501683) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 18890 + ... + 25491.

It is an arithmetic number, because the mean of its divisors is an integer number (36637341).

Almost surely, 2^146501681 is an apocalyptic number.

It is an amenable number.

146501681 is a deficient number, since it is larger than the sum of its proper divisors (47683).

146501681 is an equidigital number, since it uses as much as digits as its factorization.

146501681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47682.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 146501681 is about 12103.7878781809. The cubic root of 146501681 is about 527.1661743856.

The spelling of 146501681 in words is "one hundred forty-six million, five hundred one thousand, six hundred eighty-one".