149271905 has 8 divisors (see below), whose sum is σ = 179328384. Its totient is φ = 119282800.

The previous prime is 149271869. The next prime is 149271907. The reversal of 149271905 is 509172941.

149271905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 149271905 - 2⁸ = 149271649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149271907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11831 + ... + 20940.

It is an arithmetic number, because the mean of its divisors is an integer number (22416048).

Almost surely, 2^149271905 is an apocalyptic number.

It is an amenable number.

149271905 is a deficient number, since it is larger than the sum of its proper divisors (30056479).

149271905 is an equidigital number, since it uses as much as digits as its factorization.

149271905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33687.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 149271905 is about 12217.6882019472. The cubic root of 149271905 is about 530.4682049888.

The spelling of 149271905 in words is "one hundred forty-nine million, two hundred seventy-one thousand, nine hundred five".