109802642 has 24 divisors (see below), whose sum is σ = 172593876. Its totient is φ = 52383744.

The previous prime is 109802639. The next prime is 109802647. The reversal of 109802642 is 246208901.

It can be written as a sum of positive squares in 6 ways, for example, as 45144961 + 64657681 = 6719^2 + 8041^2 .

It is a junction number, because it is equal to n+sod(n) for n = 109802599 and 109802608.

It is not an unprimeable number, because it can be changed into a prime (109802647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162818 + ... + 163490.

Almost surely, 2^109802642 is an apocalyptic number.

109802642 is a deficient number, since it is larger than the sum of its proper divisors (62791234).

109802642 is an equidigital number, since it uses as much as digits as its factorization.

109802642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 109802642 is about 10478.6755842520. The cubic root of 109802642 is about 478.8552611184.

The spelling of 109802642 in words is "one hundred nine million, eight hundred two thousand, six hundred forty-two".