1530631 has 2 divisors, whose sum is σ = 1530632. Its totient is φ = 1530630.

The previous prime is 1530623. The next prime is 1530647. The reversal of 1530631 is 1360351.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1530631 - 2³ = 1530623 is a prime.

It is a super-2 number, since 2×1530631² = 4685662516322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1530599 and 1530608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1530601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765315 + 765316.

It is an arithmetic number, because the mean of its divisors is an integer number (765316).

2^1530631 is an apocalyptic number.

1530631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1530631 is an equidigital number, since it uses as much as digits as its factorization.

1530631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 1530631 is about 1237.1867280245. The cubic root of 1530631 is about 115.2453739969.

Adding to 1530631 its reverse (1360351), we get a palindrome (2890982).

The spelling of 1530631 in words is "one million, five hundred thirty thousand, six hundred thirty-one".