106415621 has 4 divisors (see below), whose sum is σ = 114601452. Its totient is φ = 98229792.

The previous prime is 106415611. The next prime is 106415627. The reversal of 106415621 is 126514601.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46430596 + 59985025 = 6814^2 + 7745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-106415621 is a prime.

It is a super-2 number, since 2×106415621² = 22648568785631282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106415627) 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 3 ways as a sum of consecutive naturals, for example, 4092896 + ... + 4092921.

It is an arithmetic number, because the mean of its divisors is an integer number (28650363).

Almost surely, 2^106415621 is an apocalyptic number.

It is an amenable number.

106415621 is a deficient number, since it is larger than the sum of its proper divisors (8185831).

106415621 is an equidigital number, since it uses as much as digits as its factorization.

106415621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8185830.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 106415621 is about 10315.7947342897. The cubic root of 106415621 is about 473.8800888913.

The spelling of 106415621 in words is "one hundred six million, four hundred fifteen thousand, six hundred twenty-one".