149220 has 36 divisors (see below), whose sum is σ = 453180. Its totient is φ = 39744.

The previous prime is 149213. The next prime is 149239. The reversal of 149220 is 22941.

149220 is nontrivially palindromic in base 8.

149220 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 69696 + 79524 = 264^2 + 282^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 149193 and 149202.

It is an unprimeable number.

149220 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 235 + ... + 594.

2¹⁴⁹²²⁰ is an apocalyptic number.

149220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

149220 is an abundant number, since it is smaller than the sum of its proper divisors (303960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

149220 is a wasteful number, since it uses less digits than its factorization.

149220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844 (or 839 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 149220 is about 386.2900464677. The cubic root of 149220 is about 53.0406712854.

The spelling of 149220 in words is "one hundred forty-nine thousand, two hundred twenty".