1530623 has 2 divisors, whose sum is σ = 1530624. Its totient is φ = 1530622.

The previous prime is 1530611. The next prime is 1530631. The reversal of 1530623 is 3260351.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1530623 - 2⁶ = 1530559 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1530595 and 1530604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1530523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765311 + 765312.

It is an arithmetic number, because the mean of its divisors is an integer number (765312).

2^1530623 is an apocalyptic number.

1530623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1530623 is an equidigital number, since it uses as much as digits as its factorization.

1530623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 1530623 is about 1237.1834948786. The cubic root of 1530623 is about 115.2451732160.

Adding to 1530623 its reverse (3260351), we get a palindrome (4790974).

The spelling of 1530623 in words is "one million, five hundred thirty thousand, six hundred twenty-three".