146640161 has 4 divisors (see below), whose sum is σ = 146783424. Its totient is φ = 146496900.

The previous prime is 146640107. The next prime is 146640209. The reversal of 146640161 is 161046641.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 146640161 - 2¹⁴ = 146623777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146640661) 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, 70085 + ... + 72146.

It is an arithmetic number, because the mean of its divisors is an integer number (36695856).

Almost surely, 2^146640161 is an apocalyptic number.

It is an amenable number.

146640161 is a deficient number, since it is larger than the sum of its proper divisors (143263).

146640161 is a wasteful number, since it uses less digits than its factorization.

146640161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143262.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 146640161 is about 12109.5070502478. The cubic root of 146640161 is about 527.3322224969.

The spelling of 146640161 in words is "one hundred forty-six million, six hundred forty thousand, one hundred sixty-one".