101428591 has 8 divisors (see below), whose sum is σ = 112737744. Its totient is φ = 90467520.

The previous prime is 101428577. The next prime is 101428603. The reversal of 101428591 is 195824101.

It is a happy number.

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

It is not a de Polignac number, because 101428591 - 2¹⁷ = 101297519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101428501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86406 + ... + 87571.

It is an arithmetic number, because the mean of its divisors is an integer number (14092218).

Almost surely, 2^101428591 is an apocalyptic number.

101428591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

101428591 is a deficient number, since it is larger than the sum of its proper divisors (11309153).

101428591 is a wasteful number, since it uses less digits than its factorization.

101428591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174041.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 101428591 is about 10071.1762470925. The cubic root of 101428591 is about 466.3587513549.

The spelling of 101428591 in words is "one hundred one million, four hundred twenty-eight thousand, five hundred ninety-one".