154485442 has 4 divisors (see below), whose sum is σ = 231728166. Its totient is φ = 77242720.

The previous prime is 154485437. The next prime is 154485449. The reversal of 154485442 is 244584451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244584451 = 31 ⋅7889821.

It can be written as a sum of positive squares in only one way, i.e., 111070521 + 43414921 = 10539^2 + 6589^2 .

It is not an unprimeable number, because it can be changed into a prime (154485449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38621359 + ... + 38621362.

Almost surely, 2^154485442 is an apocalyptic number.

154485442 is a deficient number, since it is larger than the sum of its proper divisors (77242724).

154485442 is an equidigital number, since it uses as much as digits as its factorization.

154485442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77242723.

The product of its digits is 102400, while the sum is 37.

The square root of 154485442 is about 12429.2172722179. The cubic root of 154485442 is about 536.5734585156.

Subtracting 154485442 from its reverse (244584451), we obtain a palindrome (90099009).

The spelling of 154485442 in words is "one hundred fifty-four million, four hundred eighty-five thousand, four hundred forty-two".