106421638 has 8 divisors (see below), whose sum is σ = 159917688. Its totient is φ = 53115744.

The previous prime is 106421633. The next prime is 106421639. The reversal of 106421638 is 836124601.

It is a happy number.

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

It is a super-2 number, since 2×106421638² = 22651130069206088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106421633) 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, 46131 + ... + 48382.

It is an arithmetic number, because the mean of its divisors is an integer number (19989711).

Almost surely, 2^106421638 is an apocalyptic number.

106421638 is a deficient number, since it is larger than the sum of its proper divisors (53496050).

106421638 is an equidigital number, since it uses as much as digits as its factorization.

106421638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95078.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 106421638 is about 10316.0863703247. The cubic root of 106421638 is about 473.8890201702.

The spelling of 106421638 in words is "one hundred six million, four hundred twenty-one thousand, six hundred thirty-eight".