1345521 has 8 divisors (see below), whose sum is σ = 1819584. Its totient is φ = 884240.

The previous prime is 1345507. The next prime is 1345537. The reversal of 1345521 is 1255431.

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

It is a cyclic number.

It is not a de Polignac number, because 1345521 - 2⁶ = 1345457 is a prime.

It is a super-2 number, since 2×1345521² = 3620853522882, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1345541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2946 + ... + 3371.

It is an arithmetic number, because the mean of its divisors is an integer number (227448).

2^1345521 is an apocalyptic number.

It is an amenable number.

1345521 is a deficient number, since it is larger than the sum of its proper divisors (474063).

1345521 is an equidigital number, since it uses as much as digits as its factorization.

1345521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6391.

The product of its digits is 600, while the sum is 21.

The square root of 1345521 is about 1159.9659477761. The cubic root of 1345521 is about 110.3985815560.

The spelling of 1345521 in words is "one million, three hundred forty-five thousand, five hundred twenty-one".