105421442 has 12 divisors (see below), whose sum is σ = 183949830. Its totient is φ = 45180576.

The previous prime is 105421387. The next prime is 105421447. The reversal of 105421442 is 244124501.

It can be written as a sum of positive squares in only one way, i.e., 100620961 + 4800481 = 10031^2 + 2191^2 .

It is a super-2 number, since 2×105421442² = 22227360866718728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105421447) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 537767 + ... + 537962.

Almost surely, 2^105421442 is an apocalyptic number.

105421442 is a deficient number, since it is larger than the sum of its proper divisors (78528388).

105421442 is a wasteful number, since it uses less digits than its factorization.

105421442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075745 (or 1075738 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 105421442 is about 10267.4944363267. The cubic root of 105421442 is about 472.3997409591.

Adding to 105421442 its reverse (244124501), we get a palindrome (349545943).

The spelling of 105421442 in words is "one hundred five million, four hundred twenty-one thousand, four hundred forty-two".