149642249 has 4 divisors (see below), whose sum is σ = 149854020. Its totient is φ = 149430480.

The previous prime is 149642237. The next prime is 149642261. The reversal of 149642249 is 942246941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 942246941 = 4507 ⋅209063.

It is an interprime number because it is at equal distance from previous prime (149642237) and next prime (149642261).

It can be written as a sum of positive squares in 2 ways, for example, as 32569849 + 117072400 = 5707^2 + 10820^2 .

It is a cyclic number.

It is not a de Polignac number, because 149642249 - 2⁸ = 149641993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (149642749) 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, 104822 + ... + 106239.

It is an arithmetic number, because the mean of its divisors is an integer number (37463505).

Almost surely, 2^149642249 is an apocalyptic number.

It is an amenable number.

149642249 is a deficient number, since it is larger than the sum of its proper divisors (211771).

149642249 is an equidigital number, since it uses as much as digits as its factorization.

149642249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211770.

The product of its digits is 124416, while the sum is 41.

The square root of 149642249 is about 12232.8348717703. The cubic root of 149642249 is about 530.9065403684.

The spelling of 149642249 in words is "one hundred forty-nine million, six hundred forty-two thousand, two hundred forty-nine".