154421291 has 2 divisors, whose sum is σ = 154421292. Its totient is φ = 154421290.

The previous prime is 154421257. The next prime is 154421339. The reversal of 154421291 is 192124451.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 154421291 - 2²² = 150226987 is a prime.

It is a super-2 number, since 2×154421291² = 47691870228213362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (154420291) 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, 77210645 + 77210646.

It is an arithmetic number, because the mean of its divisors is an integer number (77210646).

Almost surely, 2^154421291 is an apocalyptic number.

154421291 is a deficient number, since it is larger than the sum of its proper divisors (1).

154421291 is an equidigital number, since it uses as much as digits as its factorization.

154421291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 29.

The square root of 154421291 is about 12426.6363510002. The cubic root of 154421291 is about 536.4991764577.

The spelling of 154421291 in words is "one hundred fifty-four million, four hundred twenty-one thousand, two hundred ninety-one".