146637481 has 4 divisors (see below), whose sum is σ = 146749312. Its totient is φ = 146525652.

The previous prime is 146637467. The next prime is 146637487. The reversal of 146637481 is 184736641.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146637481 is a prime.

It is a super-2 number, since 2×146637481² = 43005101668050722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146637487) 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, 53925 + ... + 56578.

It is an arithmetic number, because the mean of its divisors is an integer number (36687328).

Almost surely, 2^146637481 is an apocalyptic number.

It is an amenable number.

146637481 is a deficient number, since it is larger than the sum of its proper divisors (111831).

146637481 is a wasteful number, since it uses less digits than its factorization.

146637481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111830.

The product of its digits is 96768, while the sum is 40.

The square root of 146637481 is about 12109.3963928843. The cubic root of 146637481 is about 527.3290099641.

The spelling of 146637481 in words is "one hundred forty-six million, six hundred thirty-seven thousand, four hundred eighty-one".