149438 has 4 divisors (see below), whose sum is σ = 224160. Its totient is φ = 74718.

The previous prime is 149423. The next prime is 149441. The reversal of 149438 is 834941.

It is a semiprime because it is the product of two primes.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 149438.

It is a congruent number.

It is an unprimeable number.

149438 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37358 + ... + 37361.

It is an arithmetic number, because the mean of its divisors is an integer number (56040).

2¹⁴⁹⁴³⁸ is an apocalyptic number.

149438 is a deficient number, since it is larger than the sum of its proper divisors (74722).

149438 is an equidigital number, since it uses as much as digits as its factorization.

149438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74721.

The product of its digits is 3456, while the sum is 29.

The square root of 149438 is about 386.5721148764. The cubic root of 149438 is about 53.0664882895.

The spelling of 149438 in words is "one hundred forty-nine thousand, four hundred thirty-eight".