149709545 has 4 divisors (see below), whose sum is σ = 179651460. Its totient is φ = 119767632.

The previous prime is 149709541. The next prime is 149709563. The reversal of 149709545 is 545907941.

149709545 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, and also an emirpimes, since its reverse is a distinct semiprime: 545907941 = 311 ⋅1755331.

It can be written as a sum of positive squares in 2 ways, for example, as 73479184 + 76230361 = 8572^2 + 8731^2 .

It is a cyclic number.

It is not a de Polignac number, because 149709545 - 2² = 149709541 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 149709496 and 149709505.

It is not an unprimeable number, because it can be changed into a prime (149709541) 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, 14970950 + ... + 14970959.

It is an arithmetic number, because the mean of its divisors is an integer number (44912865).

Almost surely, 2^149709545 is an apocalyptic number.

It is an amenable number.

149709545 is a deficient number, since it is larger than the sum of its proper divisors (29941915).

149709545 is an equidigital number, since it uses as much as digits as its factorization.

149709545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29941914.

The product of its (nonzero) digits is 226800, while the sum is 44.

The square root of 149709545 is about 12235.5851923805. The cubic root of 149709545 is about 530.9861135557.

The spelling of 149709545 in words is "one hundred forty-nine million, seven hundred nine thousand, five hundred forty-five".