154855945 has 4 divisors (see below), whose sum is σ = 185827140. Its totient is φ = 123884752.

The previous prime is 154855931. The next prime is 154855949. The reversal of 154855945 is 549558451.

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

It can be written as a sum of positive squares in 2 ways, for example, as 55115776 + 99740169 = 7424^2 + 9987^2 .

It is a cyclic number.

It is not a de Polignac number, because 154855945 - 2⁵ = 154855913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 154855895 and 154855904.

It is not an unprimeable number, because it can be changed into a prime (154855949) by changing a digit.

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, 15485590 + ... + 15485599.

It is an arithmetic number, because the mean of its divisors is an integer number (46456785).

Almost surely, 2^154855945 is an apocalyptic number.

It is an amenable number.

154855945 is a deficient number, since it is larger than the sum of its proper divisors (30971195).

154855945 is an equidigital number, since it uses as much as digits as its factorization.

154855945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30971194.

The product of its digits is 720000, while the sum is 46.

The square root of 154855945 is about 12444.1128651262. The cubic root of 154855945 is about 537.0020714121.

The spelling of 154855945 in words is "one hundred fifty-four million, eight hundred fifty-five thousand, nine hundred forty-five".