1401543 has 40 divisors (see below), whose sum is σ = 2480016. Its totient is φ = 784080.

The previous prime is 1401529. The next prime is 1401559. The reversal of 1401543 is 3451041.

It is a happy number.

It is not a de Polignac number, because 1401543 - 2⁵ = 1401511 is a prime.

1401543 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401443) 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 39 ways as a sum of consecutive naturals, for example, 107805 + ... + 107817.

2^1401543 is an apocalyptic number.

1401543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1401543 is a deficient number, since it is larger than the sum of its proper divisors (1078473).

1401543 is an equidigital number, since it uses as much as digits as its factorization.

1401543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1401543 is about 1183.8678135670. The cubic root of 1401543 is about 111.9099776195.

Adding to 1401543 its reverse (3451041), we get a palindrome (4852584).

The spelling of 1401543 in words is "one million, four hundred one thousand, five hundred forty-three".