155420459 has 2 divisors, whose sum is σ = 155420460. Its totient is φ = 155420458.

The previous prime is 155420383. The next prime is 155420467. The reversal of 155420459 is 954024551.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155420459 - 2²⁴ = 138643243 is a prime.

It is not a weakly prime, because it can be changed into another prime (155420059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77710229 + 77710230.

It is an arithmetic number, because the mean of its divisors is an integer number (77710230).

Almost surely, 2^155420459 is an apocalyptic number.

155420459 is a deficient number, since it is larger than the sum of its proper divisors (1).

155420459 is an equidigital number, since it uses as much as digits as its factorization.

155420459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 155420459 is about 12466.7742018535. The cubic root of 155420459 is about 537.6538116866.

The spelling of 155420459 in words is "one hundred fifty-five million, four hundred twenty thousand, four hundred fifty-nine".