149218 has 4 divisors (see below), whose sum is σ = 223830. Its totient is φ = 74608.

The previous prime is 149213. The next prime is 149239. The reversal of 149218 is 812941.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812941 = 827 ⋅983.

It can be written as a sum of positive squares in only one way, i.e., 88209 + 61009 = 297^2 + 247^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 149192 and 149201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37303 + ... + 37306.

2¹⁴⁹²¹⁸ is an apocalyptic number.

149218 is a deficient number, since it is larger than the sum of its proper divisors (74612).

149218 is an equidigital number, since it uses as much as digits as its factorization.

149218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74611.

The product of its digits is 576, while the sum is 25.

The square root of 149218 is about 386.2874577306. The cubic root of 149218 is about 53.0404343158.

The spelling of 149218 in words is "one hundred forty-nine thousand, two hundred eighteen".