146785881 has 16 divisors (see below), whose sum is σ = 213812928. Its totient is φ = 88833600.

The previous prime is 146785867. The next prime is 146785909. The reversal of 146785881 is 188587641.

It is a happy number.

It is not a de Polignac number, because 146785881 - 2⁶ = 146785817 is a prime.

It is a super-2 number, since 2×146785881² = 43092189721892322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 146785881.

It is not an unprimeable number, because it can be changed into a prime (146785801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23511 + ... + 29091.

It is an arithmetic number, because the mean of its divisors is an integer number (13363308).

Almost surely, 2^146785881 is an apocalyptic number.

146785881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

146785881 is a deficient number, since it is larger than the sum of its proper divisors (67027047).

146785881 is a wasteful number, since it uses less digits than its factorization.

146785881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6392.

The product of its digits is 430080, while the sum is 48.

The square root of 146785881 is about 12115.5223164336. The cubic root of 146785881 is about 527.5068390809.

The spelling of 146785881 in words is "one hundred forty-six million, seven hundred eighty-five thousand, eight hundred eighty-one".