901543 has 4 divisors (see below), whose sum is σ = 903448. Its totient is φ = 899640.

The previous prime is 901529. The next prime is 901547. The reversal of 901543 is 345109.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 901543 - 2¹³ = 893351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901547) 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 3 ways as a sum of consecutive naturals, for example, 373 + ... + 1393.

It is an arithmetic number, because the mean of its divisors is an integer number (225862).

2⁹⁰¹⁵⁴³ is an apocalyptic number.

901543 is a deficient number, since it is larger than the sum of its proper divisors (1905).

901543 is a wasteful number, since it uses less digits than its factorization.

901543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 901543 is about 949.4961821935. The cubic root of 901543 is about 96.6040828889.

It can be divided in two parts, 901 and 543, that added together give a square (1444 = 38²).

The spelling of 901543 in words is "nine hundred one thousand, five hundred forty-three".