146393281 has 8 divisors (see below), whose sum is σ = 148189184. Its totient is φ = 144607680.

The previous prime is 146393263. The next prime is 146393293. The reversal of 146393281 is 182393641.

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 146393281 - 2⁵ = 146393249 is a prime.

It is a super-2 number, since 2×146393281² = 42861985443889922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 146393281.

It is not an unprimeable number, because it can be changed into a prime (146393231) 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, 28216 + ... + 32998.

It is an arithmetic number, because the mean of its divisors is an integer number (18523648).

Almost surely, 2^146393281 is an apocalyptic number.

It is an amenable number.

146393281 is a deficient number, since it is larger than the sum of its proper divisors (1795903).

146393281 is a wasteful number, since it uses less digits than its factorization.

146393281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151.

The product of its digits is 31104, while the sum is 37.

The square root of 146393281 is about 12099.3091125072. The cubic root of 146393281 is about 527.0361214675.

The spelling of 146393281 in words is "one hundred forty-six million, three hundred ninety-three thousand, two hundred eighty-one".