105421013 has 4 divisors (see below), whose sum is σ = 106905888. Its totient is φ = 103936140.

The previous prime is 105421009. The next prime is 105421027. The reversal of 105421013 is 310124501.

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 not a de Polignac number, because 105421013 - 2² = 105421009 is a prime.

It is a super-2 number, since 2×105421013² = 22227179963892338, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 105420982 and 105421000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105451013) 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, 742331 + ... + 742472.

It is an arithmetic number, because the mean of its divisors is an integer number (26726472).

Almost surely, 2^105421013 is an apocalyptic number.

It is an amenable number.

105421013 is a deficient number, since it is larger than the sum of its proper divisors (1484875).

105421013 is an equidigital number, since it uses as much as digits as its factorization.

105421013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484874.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 105421013 is about 10267.4735451327. The cubic root of 105421013 is about 472.3991001667.

Adding to 105421013 its reverse (310124501), we get a palindrome (415545514).

The spelling of 105421013 in words is "one hundred five million, four hundred twenty-one thousand, thirteen".