1551506 has 16 divisors (see below), whose sum is σ = 2566080. Its totient is φ = 697680.

The previous prime is 1551499. The next prime is 1551551. The reversal of 1551506 is 6051551.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2075 + ... + 2721.

It is an arithmetic number, because the mean of its divisors is an integer number (160380).

2^1551506 is an apocalyptic number.

1551506 is a deficient number, since it is larger than the sum of its proper divisors (1014574).

1551506 is a wasteful number, since it uses less digits than its factorization.

1551506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769.

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

The square root of 1551506 is about 1245.5946371111. The cubic root of 1551506 is about 115.7669220036.

It can be divided in two parts, 155 and 1506, that added together give a palindrome (1661).

The spelling of 1551506 in words is "one million, five hundred fifty-one thousand, five hundred six".