154430249 has 4 divisors (see below), whose sum is σ = 159755460. Its totient is φ = 149105040.

The previous prime is 154430239. The next prime is 154430273. The reversal of 154430249 is 942034451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 942034451 = 479 ⋅1966669.

It can be written as a sum of positive squares in 2 ways, for example, as 103164649 + 51265600 = 10157^2 + 7160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154430249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154430239) 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, 2662562 + ... + 2662619.

It is an arithmetic number, because the mean of its divisors is an integer number (39938865).

Almost surely, 2^154430249 is an apocalyptic number.

It is an amenable number.

154430249 is a deficient number, since it is larger than the sum of its proper divisors (5325211).

154430249 is an equidigital number, since it uses as much as digits as its factorization.

154430249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5325210.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 154430249 is about 12426.9967812018. The cubic root of 154430249 is about 536.5095503871.

The spelling of 154430249 in words is "one hundred fifty-four million, four hundred thirty thousand, two hundred forty-nine".