154420417 has 2 divisors, whose sum is σ = 154420418. Its totient is φ = 154420416.

The previous prime is 154420397. The next prime is 154420507. The reversal of 154420417 is 714024451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128165041 + 26255376 = 11321^2 + 5124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154420417 is a prime.

It is not a weakly prime, because it can be changed into another prime (154420117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77210208 + 77210209.

It is an arithmetic number, because the mean of its divisors is an integer number (77210209).

Almost surely, 2^154420417 is an apocalyptic number.

It is an amenable number.

154420417 is a deficient number, since it is larger than the sum of its proper divisors (1).

154420417 is an equidigital number, since it uses as much as digits as its factorization.

154420417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 154420417 is about 12426.6011845557. The cubic root of 154420417 is about 536.4981642891.

Adding to 154420417 its reverse (714024451), we get a palindrome (868444868).

The spelling of 154420417 in words is "one hundred fifty-four million, four hundred twenty thousand, four hundred seventeen".