1004145531 has 4 divisors (see below), whose sum is σ = 1338860712. Its totient is φ = 669430352.

The previous prime is 1004145487. The next prime is 1004145547. The reversal of 1004145531 is 1355414001.

It is a happy number.

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 1004145531 - 2²¹ = 1002048379 is a prime.

It is a super-2 number, since 2×1004145531² = 2016616494854543922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1004145551) 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 in 3 ways as a sum of consecutive naturals, for example, 167357586 + ... + 167357591.

It is an arithmetic number, because the mean of its divisors is an integer number (334715178).

Almost surely, 2^1004145531 is an apocalyptic number.

1004145531 is a deficient number, since it is larger than the sum of its proper divisors (334715181).

1004145531 is an equidigital number, since it uses as much as digits as its factorization.

1004145531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334715180.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1004145531 is about 31688.2554111141. The cubic root of 1004145531 is about 1001.3799385603.

Adding to 1004145531 its reverse (1355414001), we get a palindrome (2359559532).

The spelling of 1004145531 in words is "one billion, four million, one hundred forty-five thousand, five hundred thirty-one".