154421429 has 2 divisors, whose sum is σ = 154421430. Its totient is φ = 154421428.

The previous prime is 154421401. The next prime is 154421441. The reversal of 154421429 is 924124451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154380625 + 40804 = 12425^2 + 202^2 .

It is a cyclic number.

It is not a de Polignac number, because 154421429 - 2⁸ = 154421173 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 154421395 and 154421404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154424429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77210714 + 77210715.

It is an arithmetic number, because the mean of its divisors is an integer number (77210715).

Almost surely, 2^154421429 is an apocalyptic number.

It is an amenable number.

154421429 is a deficient number, since it is larger than the sum of its proper divisors (1).

154421429 is an equidigital number, since it uses as much as digits as its factorization.

154421429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 154421429 is about 12426.6419035876. The cubic root of 154421429 is about 536.4993362735.

The spelling of 154421429 in words is "one hundred fifty-four million, four hundred twenty-one thousand, four hundred twenty-nine".