155421485 has 16 divisors (see below), whose sum is σ = 190045440. Its totient is φ = 121994880.

The previous prime is 155421439. The next prime is 155421491. The reversal of 155421485 is 584124551.

It is a de Polignac number, because none of the positive numbers 2^k-155421485 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 81776 + ... + 83654.

It is an arithmetic number, because the mean of its divisors is an integer number (11877840).

Almost surely, 2^155421485 is an apocalyptic number.

It is an amenable number.

155421485 is a deficient number, since it is larger than the sum of its proper divisors (34623955).

155421485 is a wasteful number, since it uses less digits than its factorization.

155421485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188.

The product of its digits is 32000, while the sum is 35.

The square root of 155421485 is about 12466.8153511633. The cubic root of 155421485 is about 537.6549947818.

The spelling of 155421485 in words is "one hundred fifty-five million, four hundred twenty-one thousand, four hundred eighty-five".