1521143 has 8 divisors (see below), whose sum is σ = 1734768. Its totient is φ = 1321344.

The previous prime is 1521133. The next prime is 1521193. The reversal of 1521143 is 3411251.

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

It is a cyclic number.

It is not a de Polignac number, because 1521143 - 2⁸ = 1520887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3221 + ... + 3662.

It is an arithmetic number, because the mean of its divisors is an integer number (216846).

2^1521143 is an apocalyptic number.

1521143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1521143 is a deficient number, since it is larger than the sum of its proper divisors (213625).

1521143 is a wasteful number, since it uses less digits than its factorization.

1521143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6913.

The product of its digits is 120, while the sum is 17.

The square root of 1521143 is about 1233.3462611935. The cubic root of 1521143 is about 115.0067544867.

Adding to 1521143 its reverse (3411251), we get a palindrome (4932394).

The spelling of 1521143 in words is "one million, five hundred twenty-one thousand, one hundred forty-three".