105490621 has 4 divisors (see below), whose sum is σ = 106935772. Its totient is φ = 104045472.

The previous prime is 105490579. The next prime is 105490639. The reversal of 105490621 is 126094501.

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

It can be written as a sum of positive squares in 2 ways, for example, as 55279225 + 50211396 = 7435^2 + 7086^2 .

It is a cyclic number.

It is not a de Polignac number, because 105490621 - 2¹⁵ = 105457853 is a prime.

It is a super-2 number, since 2×105490621² = 22256542237931282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 105490621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105490691) 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, 722466 + ... + 722611.

It is an arithmetic number, because the mean of its divisors is an integer number (26733943).

Almost surely, 2^105490621 is an apocalyptic number.

It is an amenable number.

105490621 is a deficient number, since it is larger than the sum of its proper divisors (1445151).

105490621 is an equidigital number, since it uses as much as digits as its factorization.

105490621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445150.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 105490621 is about 10270.8627193630. The cubic root of 105490621 is about 472.5030501002.

The spelling of 105490621 in words is "one hundred five million, four hundred ninety thousand, six hundred twenty-one".