154214561 has 2 divisors, whose sum is σ = 154214562. Its totient is φ = 154214560.

The previous prime is 154214549. The next prime is 154214569. The reversal of 154214561 is 165412451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78872161 + 75342400 = 8881^2 + 8680^2 .

It is a cyclic number.

It is not a de Polignac number, because 154214561 - 2¹⁰ = 154213537 is a prime.

It is not a weakly prime, because it can be changed into another prime (154214569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77107280 + 77107281.

It is an arithmetic number, because the mean of its divisors is an integer number (77107281).

Almost surely, 2^154214561 is an apocalyptic number.

It is an amenable number.

154214561 is a deficient number, since it is larger than the sum of its proper divisors (1).

154214561 is an equidigital number, since it uses as much as digits as its factorization.

154214561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800, while the sum is 29.

The square root of 154214561 is about 12418.3155459990. The cubic root of 154214561 is about 536.2596585253.

The spelling of 154214561 in words is "one hundred fifty-four million, two hundred fourteen thousand, five hundred sixty-one".