154042243 has 2 divisors, whose sum is σ = 154042244. Its totient is φ = 154042242.

The previous prime is 154042223. The next prime is 154042261. The reversal of 154042243 is 342240451.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 154042243 - 2²⁵ = 120487811 is a prime.

It is not a weakly prime, because it can be changed into another prime (154042223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77021121 + 77021122.

It is an arithmetic number, because the mean of its divisors is an integer number (77021122).

Almost surely, 2^154042243 is an apocalyptic number.

154042243 is a deficient number, since it is larger than the sum of its proper divisors (1).

154042243 is an equidigital number, since it uses as much as digits as its factorization.

154042243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 154042243 is about 12411.3755482622. The cubic root of 154042243 is about 536.0598468020.

Adding to 154042243 its reverse (342240451), we get a palindrome (496282694).

The spelling of 154042243 in words is "one hundred fifty-four million, forty-two thousand, two hundred forty-three".