154455121 has 2 divisors, whose sum is σ = 154455122. Its totient is φ = 154455120.

The previous prime is 154455107. The next prime is 154455179. The reversal of 154455121 is 121554451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85747600 + 68707521 = 9260^2 + 8289^2 .

It is a cyclic number.

It is not a de Polignac number, because 154455121 - 2¹⁵ = 154422353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 154455121.

It is not a weakly prime, because it can be changed into another prime (154455101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77227560 + 77227561.

It is an arithmetic number, because the mean of its divisors is an integer number (77227561).

Almost surely, 2^154455121 is an apocalyptic number.

It is an amenable number.

154455121 is a deficient number, since it is larger than the sum of its proper divisors (1).

154455121 is an equidigital number, since it uses as much as digits as its factorization.

154455121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4000, while the sum is 28.

The square root of 154455121 is about 12427.9974654004. The cubic root of 154455121 is about 536.5383516297.

It can be divided in two parts, 1544 and 55121, that added together give a palindrome (56665).

The spelling of 154455121 in words is "one hundred fifty-four million, four hundred fifty-five thousand, one hundred twenty-one".