1530531 has 12 divisors (see below), whose sum is σ = 2225808. Its totient is φ = 1013424.

The previous prime is 1530523. The next prime is 1530539. The reversal of 1530531 is 1350351.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1530523) and next prime (1530539).

It is not a de Polignac number, because 1530531 - 2³ = 1530523 is a prime.

It is a super-2 number, since 2×1530531² = 4685050283922, which contains 22 as substring.

1530531 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1530539) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1066 + ... + 2048.

It is an arithmetic number, because the mean of its divisors is an integer number (185484).

2^1530531 is an apocalyptic number.

1530531 is a deficient number, since it is larger than the sum of its proper divisors (695277).

1530531 is a wasteful number, since it uses less digits than its factorization.

1530531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162 (or 1159 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 18.

The square root of 1530531 is about 1237.1463130932. The cubic root of 1530531 is about 115.2428641849.

Adding to 1530531 its reverse (1350351), we get a palindrome (2880882).

The spelling of 1530531 in words is "one million, five hundred thirty thousand, five hundred thirty-one".