1531340 has 24 divisors (see below), whose sum is σ = 3356640. Its totient is φ = 585728.

The previous prime is 1531337. The next prime is 1531357. The reversal of 1531340 is 431351.

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 7 ways as a sum of consecutive naturals, for example, 1205 + ... + 2124.

It is an arithmetic number, because the mean of its divisors is an integer number (139860).

2^1531340 is an apocalyptic number.

1531340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1531340 is an abundant number, since it is smaller than the sum of its proper divisors (1825300).

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

1531340 is a wasteful number, since it uses less digits than its factorization.

1531340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3361 (or 3359 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 1531340 is about 1237.4732320337. The cubic root of 1531340 is about 115.2631654301.

Adding to 1531340 its reverse (431351), we get a palindrome (1962691).

The spelling of 1531340 in words is "one million, five hundred thirty-one thousand, three hundred forty".