1531424 has 12 divisors (see below), whose sum is σ = 3015054. Its totient is φ = 765696.

The previous prime is 1531379. The next prime is 1531447. The reversal of 1531424 is 4241351.

It can be written as a sum of positive squares in only one way, i.e., 1281424 + 250000 = 1132^2 + 500^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1531396 and 1531405.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23897 + ... + 23960.

2^1531424 is an apocalyptic number.

It is an amenable number.

1531424 is a deficient number, since it is larger than the sum of its proper divisors (1483630).

1531424 is an equidigital number, since it uses as much as digits as its factorization.

1531424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47867 (or 47859 counting only the distinct ones).

The product of its digits is 480, while the sum is 20.

The square root of 1531424 is about 1237.5071716964. The cubic root of 1531424 is about 115.2652729370.

Adding to 1531424 its reverse (4241351), we get a palindrome (5772775).

The spelling of 1531424 in words is "one million, five hundred thirty-one thousand, four hundred twenty-four".