1530813 has 4 divisors (see below), whose sum is σ = 2041088. Its totient is φ = 1020540.

The previous prime is 1530803. The next prime is 1530827. The reversal of 1530813 is 3180351.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1530813 - 2¹⁸ = 1268669 is a prime.

It is a super-3 number, since 3×1530813³ = 10761868468455233391, which contains 333 as substring.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1530813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1530803) 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, 255133 + ... + 255138.

It is an arithmetic number, because the mean of its divisors is an integer number (510272).

2^1530813 is an apocalyptic number.

It is an amenable number.

1530813 is a deficient number, since it is larger than the sum of its proper divisors (510275).

1530813 is an equidigital number, since it uses as much as digits as its factorization.

1530813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510274.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1530813 is about 1237.2602798118. The cubic root of 1530813 is about 115.2499415744.

The spelling of 1530813 in words is "one million, five hundred thirty thousand, eight hundred thirteen".