1345557 has 4 divisors (see below), whose sum is σ = 1794080. Its totient is φ = 897036.

The previous prime is 1345549. The next prime is 1345559. The reversal of 1345557 is 7555431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1345557 - 2³ = 1345549 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224257 + ... + 224262.

It is an arithmetic number, because the mean of its divisors is an integer number (448520).

2^1345557 is an apocalyptic number.

It is an amenable number.

1345557 is a deficient number, since it is larger than the sum of its proper divisors (448523).

1345557 is an equidigital number, since it uses as much as digits as its factorization.

1345557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448522.

The product of its digits is 10500, while the sum is 30.

The square root of 1345557 is about 1159.9814653692. The cubic root of 1345557 is about 110.3995661346.

The spelling of 1345557 in words is "one million, three hundred forty-five thousand, five hundred fifty-seven".