1331545 has 8 divisors (see below), whose sum is σ = 1618560. Its totient is φ = 1051440.

The previous prime is 1331527. The next prime is 1331549. The reversal of 1331545 is 5451331.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1331545 - 2⁵ = 1331513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1331549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1291 + ... + 2080.

It is an arithmetic number, because the mean of its divisors is an integer number (202320).

2^1331545 is an apocalyptic number.

It is an amenable number.

1331545 is a deficient number, since it is larger than the sum of its proper divisors (287015).

1331545 is an equidigital number, since it uses as much as digits as its factorization.

1331545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3455.

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

The square root of 1331545 is about 1153.9259075001. The cubic root of 1331545 is about 110.0150117254.

Adding to 1331545 its reverse (5451331), we get a palindrome (6782876).

The spelling of 1331545 in words is "one million, three hundred thirty-one thousand, five hundred forty-five".