154087481 has 2 divisors, whose sum is σ = 154087482. Its totient is φ = 154087480.

The previous prime is 154087463. The next prime is 154087489. The reversal of 154087481 is 184780451.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144384256 + 9703225 = 12016^2 + 3115^2 .

It is a cyclic number.

It is not a de Polignac number, because 154087481 - 2¹⁴ = 154071097 is a prime.

It is a super-2 number, since 2×154087481² = 47485903601850722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (154087489) 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 as a sum of consecutive naturals, namely, 77043740 + 77043741.

It is an arithmetic number, because the mean of its divisors is an integer number (77043741).

Almost surely, 2^154087481 is an apocalyptic number.

It is an amenable number.

154087481 is a deficient number, since it is larger than the sum of its proper divisors (1).

154087481 is an equidigital number, since it uses as much as digits as its factorization.

154087481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 154087481 is about 12413.1978555085. The cubic root of 154087481 is about 536.1123170452.

The spelling of 154087481 in words is "one hundred fifty-four million, eighty-seven thousand, four hundred eighty-one".