154011521 has 2 divisors, whose sum is σ = 154011522. Its totient is φ = 154011520.

The previous prime is 154011499. The next prime is 154011541. The reversal of 154011521 is 125110451.

It is an a-pointer prime, because the next prime (154011541) can be obtained adding 154011521 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143520400 + 10491121 = 11980^2 + 3239^2 .

It is a cyclic number.

It is not a de Polignac number, because 154011521 - 2¹⁴ = 153995137 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 154011493 and 154011502.

It is not a weakly prime, because it can be changed into another prime (154011541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77005760 + 77005761.

It is an arithmetic number, because the mean of its divisors is an integer number (77005761).

Almost surely, 2^154011521 is an apocalyptic number.

It is an amenable number.

154011521 is a deficient number, since it is larger than the sum of its proper divisors (1).

154011521 is an equidigital number, since it uses as much as digits as its factorization.

154011521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 154011521 is about 12410.1378316278. The cubic root of 154011521 is about 536.0242073885.

Adding to 154011521 its reverse (125110451), we get a palindrome (279121972).

The spelling of 154011521 in words is "one hundred fifty-four million, eleven thousand, five hundred twenty-one".