1025440531 has 2 divisors, whose sum is σ = 1025440532. Its totient is φ = 1025440530.

The previous prime is 1025440529. The next prime is 1025440543. The reversal of 1025440531 is 1350445201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1025440531 - 2¹ = 1025440529 is a prime.

It is a super-2 number, since 2×1025440531² = 2103056565235123922, which contains 22 as substring.

Together with 1025440529, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1025440496 and 1025440505.

It is not a weakly prime, because it can be changed into another prime (1025440511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512720265 + 512720266.

It is an arithmetic number, because the mean of its divisors is an integer number (512720266).

Almost surely, 2^1025440531 is an apocalyptic number.

1025440531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025440531 is an equidigital number, since it uses as much as digits as its factorization.

1025440531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1025440531 is about 32022.5003864470. The cubic root of 1025440531 is about 1008.4092630723.

Adding to 1025440531 its reverse (1350445201), we get a palindrome (2375885732).

The spelling of 1025440531 in words is "one billion, twenty-five million, four hundred forty thousand, five hundred thirty-one".