1025143 has 4 divisors (see below), whose sum is σ = 1171600. Its totient is φ = 878688.

The previous prime is 1025137. The next prime is 1025147. The reversal of 1025143 is 3415201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1025143 - 2⁵ = 1025111 is a prime.

It is a Duffinian number.

1025143 is a lucky number.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025147) 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 3 ways as a sum of consecutive naturals, for example, 73218 + ... + 73231.

It is an arithmetic number, because the mean of its divisors is an integer number (292900).

2^1025143 is an apocalyptic number.

1025143 is a deficient number, since it is larger than the sum of its proper divisors (146457).

1025143 is an equidigital number, since it uses as much as digits as its factorization.

1025143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146456.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1025143 is about 1012.4934567690. The cubic root of 1025143 is about 100.8311723842.

The spelling of 1025143 in words is "one million, twenty-five thousand, one hundred forty-three".