1264543 has 12 divisors (see below), whose sum is σ = 1489752. Its totient is φ = 1070160.

The previous prime is 1264541. The next prime is 1264559. The reversal of 1264543 is 3454621.

It is not a de Polignac number, because 1264543 - 2¹ = 1264541 is a prime.

It is a Duffinian number.

1264543 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264541) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 6321 + ... + 6517.

It is an arithmetic number, because the mean of its divisors is an integer number (124146).

2^1264543 is an apocalyptic number.

1264543 is a deficient number, since it is larger than the sum of its proper divisors (225209).

1264543 is a wasteful number, since it uses less digits than its factorization.

1264543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 335 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 1264543 is about 1124.5190082875. The cubic root of 1264543 is about 108.1378840161.

The spelling of 1264543 in words is "one million, two hundred sixty-four thousand, five hundred forty-three".