1956543 has 16 divisors (see below), whose sum is σ = 2766720. Its totient is φ = 1227744.

The previous prime is 1956533. The next prime is 1956553. The reversal of 1956543 is 3456591.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1956533) and next prime (1956553).

It is not a de Polignac number, because 1956543 - 2⁴ = 1956527 is a prime.

It is a d-powerful number, because it can be written as 1 + 9 + 5⁵ + 6² + 5⁹ + 4 + 3⁵ .

1956543 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1956533) 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, 3480 + ... + 4002.

It is an arithmetic number, because the mean of its divisors is an integer number (172920).

2^1956543 is an apocalyptic number.

1956543 is a deficient number, since it is larger than the sum of its proper divisors (810177).

1956543 is a wasteful number, since it uses less digits than its factorization.

1956543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598.

The product of its digits is 16200, while the sum is 33.

The square root of 1956543 is about 1398.7648122540. The cubic root of 1956543 is about 125.0728748391.

The spelling of 1956543 in words is "one million, nine hundred fifty-six thousand, five hundred forty-three".