149747 has 4 divisors (see below), whose sum is σ = 161280. Its totient is φ = 138216.

The previous prime is 149731. The next prime is 149749. The reversal of 149747 is 747941.

149747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 149747 - 2⁴ = 149731 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (149749) 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, 5747 + ... + 5772.

It is an arithmetic number, because the mean of its divisors is an integer number (40320).

2¹⁴⁹⁷⁴⁷ is an apocalyptic number.

149747 is a deficient number, since it is larger than the sum of its proper divisors (11533).

149747 is a wasteful number, since it uses less digits than its factorization.

149747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11532.

The product of its digits is 7056, while the sum is 32.

The square root of 149747 is about 386.9715751835. The cubic root of 149747 is about 53.1030391353.

The spelling of 149747 in words is "one hundred forty-nine thousand, seven hundred forty-seven".