100421767 has 4 divisors (see below), whose sum is σ = 100860520. Its totient is φ = 99983016.

The previous prime is 100421743. The next prime is 100421773. The reversal of 100421767 is 767124001.

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

It is a cyclic number.

It is not a de Polignac number, because 100421767 - 2¹¹ = 100419719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100421267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219033 + ... + 219490.

It is an arithmetic number, because the mean of its divisors is an integer number (25215130).

Almost surely, 2^100421767 is an apocalyptic number.

100421767 is a deficient number, since it is larger than the sum of its proper divisors (438753).

100421767 is an equidigital number, since it uses as much as digits as its factorization.

100421767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438752.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 100421767 is about 10021.0661608434. The cubic root of 100421767 is about 464.8105244150.

Adding to 100421767 its reverse (767124001), we get a palindrome (867545768).

The spelling of 100421767 in words is "one hundred million, four hundred twenty-one thousand, seven hundred sixty-seven".