1002540531 has 4 divisors (see below), whose sum is σ = 1336720712. Its totient is φ = 668360352.

The previous prime is 1002540521. The next prime is 1002540559. The reversal of 1002540531 is 1350452001.

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

It is not a de Polignac number, because 1002540531 - 2⁵ = 1002540499 is a prime.

It is a super-2 number, since 2×1002540531² = 2010175032595523922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002540498 and 1002540507.

It is not an unprimeable number, because it can be changed into a prime (1002540521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167090086 + ... + 167090091.

It is an arithmetic number, because the mean of its divisors is an integer number (334180178).

Almost surely, 2^1002540531 is an apocalyptic number.

1002540531 is a deficient number, since it is larger than the sum of its proper divisors (334180181).

1002540531 is an equidigital number, since it uses as much as digits as its factorization.

1002540531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334180180.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1002540531 is about 31662.9204433198. The cubic root of 1002540531 is about 1000.8461275329.

Adding to 1002540531 its reverse (1350452001), we get a palindrome (2352992532).

The spelling of 1002540531 in words is "one billion, two million, five hundred forty thousand, five hundred thirty-one".