1002542 has 4 divisors (see below), whose sum is σ = 1503816. Its totient is φ = 501270.

The previous prime is 1002527. The next prime is 1002553. The reversal of 1002542 is 2452001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2452001 = 479 ⋅5119.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250634 + ... + 250637.

It is an arithmetic number, because the mean of its divisors is an integer number (375954).

2^1002542 is an apocalyptic number.

1002542 is a deficient number, since it is larger than the sum of its proper divisors (501274).

1002542 is an equidigital number, since it uses as much as digits as its factorization.

1002542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501273.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1002542 is about 1001.2701933045. The cubic root of 1002542 is about 100.0846616372.

Adding to 1002542 its reverse (2452001), we get a palindrome (3454543).

The spelling of 1002542 in words is "one million, two thousand, five hundred forty-two".