105761621 has 4 divisors (see below), whose sum is σ = 120870432. Its totient is φ = 90652812.

The previous prime is 105761603. The next prime is 105761627. The reversal of 105761621 is 126167501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105761621 is a prime.

It is a super-2 number, since 2×105761621² = 22371040953095282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105761627) 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, 7554395 + ... + 7554408.

It is an arithmetic number, because the mean of its divisors is an integer number (30217608).

Almost surely, 2^105761621 is an apocalyptic number.

It is an amenable number.

105761621 is a deficient number, since it is larger than the sum of its proper divisors (15108811).

105761621 is an equidigital number, since it uses as much as digits as its factorization.

105761621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15108810.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 105761621 is about 10284.0469174348. The cubic root of 105761621 is about 472.9073161595.

The spelling of 105761621 in words is "one hundred five million, seven hundred sixty-one thousand, six hundred twenty-one".