149715205 has 4 divisors (see below), whose sum is σ = 179658252. Its totient is φ = 119772160.

The previous prime is 149715187. The next prime is 149715221. The reversal of 149715205 is 502517941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502517941 = 89 ⋅5646269.

It can be written as a sum of positive squares in 2 ways, for example, as 67141636 + 82573569 = 8194^2 + 9087^2 .

It is not a de Polignac number, because 149715205 - 2¹⁹ = 149190917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 14971516 + ... + 14971525.

It is an arithmetic number, because the mean of its divisors is an integer number (44914563).

Almost surely, 2^149715205 is an apocalyptic number.

It is an amenable number.

149715205 is a deficient number, since it is larger than the sum of its proper divisors (29943047).

149715205 is an equidigital number, since it uses as much as digits as its factorization.

149715205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29943046.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 149715205 is about 12235.8164827689. The cubic root of 149715205 is about 530.9928050541.

The spelling of 149715205 in words is "one hundred forty-nine million, seven hundred fifteen thousand, two hundred five".