146332381 has 8 divisors (see below), whose sum is σ = 157689560. Its totient is φ = 134989632.

The previous prime is 146332343. The next prime is 146332399. The reversal of 146332381 is 183233641.

It can be written as a sum of positive squares in 4 ways, for example, as 26429881 + 119902500 = 5141^2 + 10950^2 .

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 146332381 - 2¹⁵ = 146299613 is a prime.

It is a super-2 number, since 2×146332381² = 42826331458258322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146332301) 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, 27355 + ... + 32263.

It is an arithmetic number, because the mean of its divisors is an integer number (19711195).

Almost surely, 2^146332381 is an apocalyptic number.

It is an amenable number.

146332381 is a deficient number, since it is larger than the sum of its proper divisors (11357179).

146332381 is a wasteful number, since it uses less digits than its factorization.

146332381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7215.

The product of its digits is 10368, while the sum is 31.

The square root of 146332381 is about 12096.7921780942. The cubic root of 146332381 is about 526.9630285146.

The spelling of 146332381 in words is "one hundred forty-six million, three hundred thirty-two thousand, three hundred eighty-one".