101209445 has 8 divisors (see below), whose sum is σ = 121511544. Its totient is φ = 80927424.

The previous prime is 101209441. The next prime is 101209457. The reversal of 101209445 is 544902101.

It can be written as a sum of positive squares in 4 ways, for example, as 25745476 + 75463969 = 5074^2 + 8687^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 101209445 - 2² = 101209441 is a prime.

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 (101209441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10367 + ... + 17603.

It is an arithmetic number, because the mean of its divisors is an integer number (15188943).

Almost surely, 2^101209445 is an apocalyptic number.

It is an amenable number.

101209445 is a deficient number, since it is larger than the sum of its proper divisors (20302099).

101209445 is an equidigital number, since it uses as much as digits as its factorization.

101209445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10039.

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

The square root of 101209445 is about 10060.2905027638. The cubic root of 101209445 is about 466.0226385387.

The spelling of 101209445 in words is "one hundred one million, two hundred nine thousand, four hundred forty-five".