149856745 has 4 divisors (see below), whose sum is σ = 179828100. Its totient is φ = 119885392.

The previous prime is 149856739. The next prime is 149856757. The reversal of 149856745 is 547658941.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547658941 = 37 ⋅14801593.

It can be written as a sum of positive squares in 2 ways, for example, as 42029289 + 107827456 = 6483^2 + 10384^2 .

It is a cyclic number.

It is not a de Polignac number, because 149856745 - 2³ = 149856737 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14985670 + ... + 14985679.

It is an arithmetic number, because the mean of its divisors is an integer number (44957025).

Almost surely, 2^149856745 is an apocalyptic number.

It is an amenable number.

149856745 is a deficient number, since it is larger than the sum of its proper divisors (29971355).

149856745 is an equidigital number, since it uses as much as digits as its factorization.

149856745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29971354.

The product of its digits is 1209600, while the sum is 49.

The square root of 149856745 is about 12241.5989560188. The cubic root of 149856745 is about 531.1600849902.

The spelling of 149856745 in words is "one hundred forty-nine million, eight hundred fifty-six thousand, seven hundred forty-five".