1551143 has 8 divisors (see below), whose sum is σ = 1766016. Its totient is φ = 1348600.

The previous prime is 1551133. The next prime is 1551157. The reversal of 1551143 is 3411551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1551143 - 2¹⁰ = 1550119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551113) 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 in 7 ways as a sum of consecutive naturals, for example, 2813 + ... + 3318.

It is an arithmetic number, because the mean of its divisors is an integer number (220752).

2^1551143 is an apocalyptic number.

1551143 is a deficient number, since it is larger than the sum of its proper divisors (214873).

1551143 is a wasteful number, since it uses less digits than its factorization.

1551143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6165.

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

The square root of 1551143 is about 1245.4489150503. The cubic root of 1551143 is about 115.7578927828.

Adding to 1551143 its reverse (3411551), we get a palindrome (4962694).

The spelling of 1551143 in words is "one million, five hundred fifty-one thousand, one hundred forty-three".