1245543 has 16 divisors (see below), whose sum is σ = 1811040. Its totient is φ = 756864.

The previous prime is 1245529. The next prime is 1245551. The reversal of 1245543 is 3455421.

It is not a de Polignac number, because 1245543 - 2⁴ = 1245527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4105 + ... + 4397.

It is an arithmetic number, because the mean of its divisors is an integer number (113190).

2^1245543 is an apocalyptic number.

1245543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1245543 is a deficient number, since it is larger than the sum of its proper divisors (565497).

1245543 is a wasteful number, since it uses less digits than its factorization.

1245543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418.

The product of its digits is 2400, while the sum is 24.

The square root of 1245543 is about 1116.0389778139. The cubic root of 1245543 is about 107.5935511583.

The spelling of 1245543 in words is "one million, two hundred forty-five thousand, five hundred forty-three".