149217 has 4 divisors (see below), whose sum is σ = 198960. Its totient is φ = 99476.

The previous prime is 149213. The next prime is 149239. The reversal of 149217 is 712941.

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 not a de Polignac number, because 149217 - 2² = 149213 is a prime.

It is a D-number.

149217 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 149217.

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 in 3 ways as a sum of consecutive naturals, for example, 24867 + ... + 24872.

It is an arithmetic number, because the mean of its divisors is an integer number (49740).

2¹⁴⁹²¹⁷ is an apocalyptic number.

It is an amenable number.

149217 is a deficient number, since it is larger than the sum of its proper divisors (49743).

149217 is an equidigital number, since it uses as much as digits as its factorization.

149217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49742.

The product of its digits is 504, while the sum is 24.

The square root of 149217 is about 386.2861633556. The cubic root of 149217 is about 53.0403158302.

The spelling of 149217 in words is "one hundred forty-nine thousand, two hundred seventeen".