101205406 has 4 divisors (see below), whose sum is σ = 151808112. Its totient is φ = 50602702.

The previous prime is 101205383. The next prime is 101205413. The reversal of 101205406 is 604502101.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 25301350 + ... + 25301353.

It is an arithmetic number, because the mean of its divisors is an integer number (37952028).

Almost surely, 2^101205406 is an apocalyptic number.

101205406 is a deficient number, since it is larger than the sum of its proper divisors (50602706).

101205406 is an equidigital number, since it uses as much as digits as its factorization.

101205406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50602705.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 101205406 is about 10060.0897610310. The cubic root of 101205406 is about 466.0164392145.

Adding to 101205406 its reverse (604502101), we get a palindrome (705707507).

The spelling of 101205406 in words is "one hundred one million, two hundred five thousand, four hundred six".