1551871 has 2 divisors, whose sum is σ = 1551872. Its totient is φ = 1551870.

The previous prime is 1551859. The next prime is 1551883. The reversal of 1551871 is 1781551.

It is a balanced prime because it is at equal distance from previous prime (1551859) and next prime (1551883).

It is an emirp because it is prime and its reverse (1781551) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1551871 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1551371) by changing a digit.

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 as a sum of consecutive naturals, namely, 775935 + 775936.

It is an arithmetic number, because the mean of its divisors is an integer number (775936).

2^1551871 is an apocalyptic number.

1551871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551871 is an equidigital number, since it uses as much as digits as its factorization.

1551871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1400, while the sum is 28.

The square root of 1551871 is about 1245.7411448612. The cubic root of 1551871 is about 115.7759995522.

The spelling of 1551871 in words is "one million, five hundred fifty-one thousand, eight hundred seventy-one".