155021459 has 2 divisors, whose sum is σ = 155021460. Its totient is φ = 155021458.

The previous prime is 155021431. The next prime is 155021473. The reversal of 155021459 is 954120551.

155021459 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (954120551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155021459 - 2¹² = 155017363 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155021429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77510729 + 77510730.

It is an arithmetic number, because the mean of its divisors is an integer number (77510730).

Almost surely, 2^155021459 is an apocalyptic number.

155021459 is a deficient number, since it is larger than the sum of its proper divisors (1).

155021459 is an equidigital number, since it uses as much as digits as its factorization.

155021459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 155021459 is about 12450.7613823412. The cubic root of 155021459 is about 537.1933238121.

It can be divided in two parts, 15502 and 1459, that added together give a palindrome (16961).

The spelling of 155021459 in words is "one hundred fifty-five million, twenty-one thousand, four hundred fifty-nine".