146381138 has 4 divisors (see below), whose sum is σ = 219571710. Its totient is φ = 73190568.

The previous prime is 146381129. The next prime is 146381141. The reversal of 146381138 is 831183641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831183641 = 101 ⋅8229541.

It can be written as a sum of positive squares in only one way, i.e., 140825689 + 5555449 = 11867^2 + 2357^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 146381098 and 146381107.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 36595283 + ... + 36595286.

Almost surely, 2^146381138 is an apocalyptic number.

146381138 is a deficient number, since it is larger than the sum of its proper divisors (73190572).

146381138 is an equidigital number, since it uses as much as digits as its factorization.

146381138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73190571.

The product of its digits is 13824, while the sum is 35.

The square root of 146381138 is about 12098.8072965892. The cubic root of 146381138 is about 527.0215489030.

The spelling of 146381138 in words is "one hundred forty-six million, three hundred eighty-one thousand, one hundred thirty-eight".