10621543 has 4 divisors (see below), whose sum is σ = 10658088. Its totient is φ = 10585000.

The previous prime is 10621537. The next prime is 10621547. The reversal of 10621543 is 34512601.

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 10621543 - 2¹⁷ = 10490471 is a prime.

It is a super-2 number, since 2×10621543² = 225634351401698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10621547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17833 + ... + 18418.

It is an arithmetic number, because the mean of its divisors is an integer number (2664522).

Almost surely, 2^10621543 is an apocalyptic number.

10621543 is a deficient number, since it is larger than the sum of its proper divisors (36545).

10621543 is an equidigital number, since it uses as much as digits as its factorization.

10621543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36544.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 10621543 is about 3259.0708798675. The cubic root of 10621543 is about 219.8176381350.

The spelling of 10621543 in words is "ten million, six hundred twenty-one thousand, five hundred forty-three".