105421447 has 2 divisors, whose sum is σ = 105421448. Its totient is φ = 105421446.

The previous prime is 105421387. The next prime is 105421451. The reversal of 105421447 is 744124501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 105421447 - 2⁷ = 105421319 is a prime.

It is a super-2 number, since 2×105421447² = 22227362975147618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105421487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52710723 + 52710724.

It is an arithmetic number, because the mean of its divisors is an integer number (52710724).

Almost surely, 2^105421447 is an apocalyptic number.

105421447 is a deficient number, since it is larger than the sum of its proper divisors (1).

105421447 is an equidigital number, since it uses as much as digits as its factorization.

105421447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 105421447 is about 10267.4946798136. The cubic root of 105421447 is about 472.3997484275.

Adding to 105421447 its reverse (744124501), we get a palindrome (849545948).

The spelling of 105421447 in words is "one hundred five million, four hundred twenty-one thousand, four hundred forty-seven".