106144721 has 4 divisors (see below), whose sum is σ = 106189632. Its totient is φ = 106099812.

The previous prime is 106144711. The next prime is 106144733. The reversal of 106144721 is 127441601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 106144721 - 2⁶ = 106144657 is a prime.

It is a super-3 number, since 3×106144721³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106144711) 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, 18701 + ... + 23706.

It is an arithmetic number, because the mean of its divisors is an integer number (26547408).

Almost surely, 2^106144721 is an apocalyptic number.

It is an amenable number.

106144721 is a deficient number, since it is larger than the sum of its proper divisors (44911).

106144721 is an equidigital number, since it uses as much as digits as its factorization.

106144721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44910.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 106144721 is about 10302.6560167755. The cubic root of 106144721 is about 473.4776316760.

The spelling of 106144721 in words is "one hundred six million, one hundred forty-four thousand, seven hundred twenty-one".