1531345 has 16 divisors (see below), whose sum is σ = 1944000. Its totient is φ = 1156288.

The previous prime is 1531337. The next prime is 1531357. The reversal of 1531345 is 5431351.

It is a happy number.

It is not a de Polignac number, because 1531345 - 2³ = 1531337 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 8466 + ... + 8644.

It is an arithmetic number, because the mean of its divisors is an integer number (121500).

2^1531345 is an apocalyptic number.

It is an amenable number.

1531345 is a deficient number, since it is larger than the sum of its proper divisors (412655).

1531345 is a wasteful number, since it uses less digits than its factorization.

1531345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272.

The product of its digits is 900, while the sum is 22.

The square root of 1531345 is about 1237.4752522778. The cubic root of 1531345 is about 115.2632908791.

Adding to 1531345 its reverse (5431351), we get a palindrome (6962696).

The spelling of 1531345 in words is "one million, five hundred thirty-one thousand, three hundred forty-five".