1551065 has 16 divisors (see below), whose sum is σ = 2030400. Its totient is φ = 1132992.

The previous prime is 1551049. The next prime is 1551083. The reversal of 1551065 is 5601551.

It is a cyclic number.

It is not a de Polignac number, because 1551065 - 2⁴ = 1551049 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1551065.

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, 2474 + ... + 3036.

It is an arithmetic number, because the mean of its divisors is an integer number (126900).

2^1551065 is an apocalyptic number.

It is an amenable number.

1551065 is a deficient number, since it is larger than the sum of its proper divisors (479335).

1551065 is a wasteful number, since it uses less digits than its factorization.

1551065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 1551065 is about 1245.4176006465. The cubic root of 1551065 is about 115.7559524358.

The spelling of 1551065 in words is "one million, five hundred fifty-one thousand, sixty-five".