101521428 has 12 divisors (see below), whose sum is σ = 236883360. Its totient is φ = 33840472.

The previous prime is 101521423. The next prime is 101521429. The reversal of 101521428 is 824125101.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 101521398 and 101521407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101521421) 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, 4230048 + ... + 4230071.

It is an arithmetic number, because the mean of its divisors is an integer number (19740280).

Almost surely, 2^101521428 is an apocalyptic number.

It is an amenable number.

101521428 is an abundant number, since it is smaller than the sum of its proper divisors (135361932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101521428 is a wasteful number, since it uses less digits than its factorization.

101521428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8460126 (or 8460124 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 101521428 is about 10075.7842374676. The cubic root of 101521428 is about 466.5009931178.

Adding to 101521428 its reverse (824125101), we get a palindrome (925646529).

The spelling of 101521428 in words is "one hundred one million, five hundred twenty-one thousand, four hundred twenty-eight".