105440642 has 8 divisors (see below), whose sum is σ = 158425932. Its totient is φ = 52632000.

The previous prime is 105440603. The next prime is 105440651. The reversal of 105440642 is 246044501.

It can be written as a sum of positive squares in 2 ways, for example, as 104632441 + 808201 = 10229^2 + 899^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×105440642² = 22235457970744328, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42659 + ... + 45062.

Almost surely, 2^105440642 is an apocalyptic number.

105440642 is a deficient number, since it is larger than the sum of its proper divisors (52985290).

105440642 is an equidigital number, since it uses as much as digits as its factorization.

105440642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88324.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 105440642 is about 10268.4293833088. The cubic root of 105440642 is about 472.4284179982.

The spelling of 105440642 in words is "one hundred five million, four hundred forty thousand, six hundred forty-two".