100722142 has 4 divisors (see below), whose sum is σ = 151083216. Its totient is φ = 50361070.

The previous prime is 100722107. The next prime is 100722151. The reversal of 100722142 is 241227001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 25180534 + ... + 25180537.

It is an arithmetic number, because the mean of its divisors is an integer number (37770804).

Almost surely, 2^100722142 is an apocalyptic number.

100722142 is a deficient number, since it is larger than the sum of its proper divisors (50361074).

100722142 is an equidigital number, since it uses as much as digits as its factorization.

100722142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50361073.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 100722142 is about 10036.0421481777. The cubic root of 100722142 is about 465.2735000276.

Adding to 100722142 its reverse (241227001), we get a palindrome (341949143).

The spelling of 100722142 in words is "one hundred million, seven hundred twenty-two thousand, one hundred forty-two".