128154565 has 32 divisors (see below), whose sum is σ = 192466944. Its totient is φ = 79583040.

The previous prime is 128154553. The next prime is 128154581. The reversal of 128154565 is 565451821.

It is a de Polignac number, because none of the positive numbers 2^k-128154565 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140842 + ... + 141748.

It is an arithmetic number, because the mean of its divisors is an integer number (6014592).

Almost surely, 2^128154565 is an apocalyptic number.

It is an amenable number.

128154565 is a deficient number, since it is larger than the sum of its proper divisors (64312379).

128154565 is a wasteful number, since it uses less digits than its factorization.

128154565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297.

The product of its digits is 48000, while the sum is 37.

The square root of 128154565 is about 11320.5373105697. The cubic root of 128154565 is about 504.1711922125.

The spelling of 128154565 in words is "one hundred twenty-eight million, one hundred fifty-four thousand, five hundred sixty-five".