1531242 has 24 divisors (see below), whose sum is σ = 3355716. Its totient is φ = 504576.

The previous prime is 1531217. The next prime is 1531253. The reversal of 1531242 is 2421351.

It can be written as a sum of positive squares in 2 ways, for example, as 1490841 + 40401 = 1221^2 + 201^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1308 + ... + 2184.

2^1531242 is an apocalyptic number.

1531242 is an abundant number, since it is smaller than the sum of its proper divisors (1824474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1531242 is a wasteful number, since it uses less digits than its factorization.

1531242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982 (or 979 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 1531242 is about 1237.4336345841. The cubic root of 1531242 is about 115.2607065746.

Adding to 1531242 its reverse (2421351), we get a palindrome (3952593).

The spelling of 1531242 in words is "one million, five hundred thirty-one thousand, two hundred forty-two".