146945281 has 8 divisors (see below), whose sum is σ = 168154560. Its totient is φ = 125790288.

The previous prime is 146945273. The next prime is 146945299. The reversal of 146945281 is 182549641.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 146945281 - 2³ = 146945273 is a prime.

It is a super-2 number, since 2×146945281² = 43185831216337922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (146945231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7591 + ... + 18748.

It is an arithmetic number, because the mean of its divisors is an integer number (21019320).

Almost surely, 2^146945281 is an apocalyptic number.

It is an amenable number.

146945281 is a deficient number, since it is larger than the sum of its proper divisors (21209279).

146945281 is an equidigital number, since it uses as much as digits as its factorization.

146945281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27143.

The product of its digits is 69120, while the sum is 40.

The square root of 146945281 is about 12122.0988694203. The cubic root of 146945281 is about 527.6977161396.

The spelling of 146945281 in words is "one hundred forty-six million, nine hundred forty-five thousand, two hundred eighty-one".