1551206 has 4 divisors (see below), whose sum is σ = 2326812. Its totient is φ = 775602.

The previous prime is 1551203. The next prime is 1551229. The reversal of 1551206 is 6021551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6021551 = 73 ⋅82487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551203) by changing a digit.

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 as a sum of consecutive naturals, namely, 387800 + ... + 387803.

It is an arithmetic number, because the mean of its divisors is an integer number (581703).

2^1551206 is an apocalyptic number.

1551206 is a deficient number, since it is larger than the sum of its proper divisors (775606).

1551206 is an equidigital number, since it uses as much as digits as its factorization.

1551206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775605.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1551206 is about 1245.4742068786. The cubic root of 1551206 is about 115.7594599387.

Adding to 1551206 its reverse (6021551), we get a palindrome (7572757).

The spelling of 1551206 in words is "one million, five hundred fifty-one thousand, two hundred six".