154581241 has 2 divisors, whose sum is σ = 154581242. Its totient is φ = 154581240.

The previous prime is 154581211. The next prime is 154581247. The reversal of 154581241 is 142185451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114575616 + 40005625 = 10704^2 + 6325^2 .

It is an emirp because it is prime and its reverse (142185451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154581241 - 2⁷ = 154581113 is a prime.

It is not a weakly prime, because it can be changed into another prime (154581247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77290620 + 77290621.

It is an arithmetic number, because the mean of its divisors is an integer number (77290621).

Almost surely, 2^154581241 is an apocalyptic number.

It is an amenable number.

154581241 is a deficient number, since it is larger than the sum of its proper divisors (1).

154581241 is an equidigital number, since it uses as much as digits as its factorization.

154581241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6400, while the sum is 31.

The square root of 154581241 is about 12433.0704574534. The cubic root of 154581241 is about 536.6843483152.

The spelling of 154581241 in words is "one hundred fifty-four million, five hundred eighty-one thousand, two hundred forty-one".