146622881 has 4 divisors (see below), whose sum is σ = 148688064. Its totient is φ = 144557700.

The previous prime is 146622799. The next prime is 146622919. The reversal of 146622881 is 188226641.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 188226641 = 23 ⋅8183767.

It is a cyclic number.

It is not a de Polignac number, because 146622881 - 2¹⁸ = 146360737 is a prime.

It is a super-2 number, since 2×146622881² = 42996538465480322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (146622481) 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, 1032485 + ... + 1032626.

It is an arithmetic number, because the mean of its divisors is an integer number (37172016).

Almost surely, 2^146622881 is an apocalyptic number.

It is an amenable number.

146622881 is a deficient number, since it is larger than the sum of its proper divisors (2065183).

146622881 is an equidigital number, since it uses as much as digits as its factorization.

146622881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065182.

The product of its digits is 36864, while the sum is 38.

The square root of 146622881 is about 12108.7935402335. The cubic root of 146622881 is about 527.3115081653.

The spelling of 146622881 in words is "one hundred forty-six million, six hundred twenty-two thousand, eight hundred eighty-one".