101621042 has 8 divisors (see below), whose sum is σ = 156149532. Its totient is φ = 49571200.

The previous prime is 101621041. The next prime is 101621081. The reversal of 101621042 is 240126101.

It can be written as a sum of positive squares in 2 ways, for example, as 92140801 + 9480241 = 9599^2 + 3079^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 101621042.

It is not an unprimeable number, because it can be changed into a prime (101621041) 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, 619559 + ... + 619722.

Almost surely, 2^101621042 is an apocalyptic number.

101621042 is a deficient number, since it is larger than the sum of its proper divisors (54528490).

101621042 is a wasteful number, since it uses less digits than its factorization.

101621042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239324.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 101621042 is about 10080.7262635189. The cubic root of 101621042 is about 466.6535219654.

Adding to 101621042 its reverse (240126101), we get a palindrome (341747143).

The spelling of 101621042 in words is "one hundred one million, six hundred twenty-one thousand, forty-two".