105220457 has 4 divisors (see below), whose sum is σ = 105306756. Its totient is φ = 105134160.

The previous prime is 105220447. The next prime is 105220471. The reversal of 105220457 is 754022501.

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 91795561 + 13424896 = 9581^2 + 3664^2 .

It is a cyclic number.

It is not a de Polignac number, because 105220457 - 2⁶ = 105220393 is a prime.

It is a super-2 number, since 2×105220457² = 22142689142577698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105220447) 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, 41294 + ... + 43767.

It is an arithmetic number, because the mean of its divisors is an integer number (26326689).

Almost surely, 2^105220457 is an apocalyptic number.

It is an amenable number.

105220457 is a deficient number, since it is larger than the sum of its proper divisors (86299).

105220457 is an equidigital number, since it uses as much as digits as its factorization.

105220457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86298.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 105220457 is about 10257.7023255698. The cubic root of 105220457 is about 472.0993414023.

Adding to 105220457 its reverse (754022501), we get a palindrome (859242958).

The spelling of 105220457 in words is "one hundred five million, two hundred twenty thousand, four hundred fifty-seven".