106521240 has 128 divisors (see below), whose sum is σ = 367557120. Its totient is φ = 24192000.

The previous prime is 106521179. The next prime is 106521241. The reversal of 106521240 is 42125601.

106521240 = T₄₈₉ + T₄₉₀ + ... + T₉₁₀.

It is a super-2 number, since 2×106521240² = 22693549142275200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106521241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176940 + ... + 177540.

It is an arithmetic number, because the mean of its divisors is an integer number (2871540).

Almost surely, 2^106521240 is an apocalyptic number.

106521240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 106521240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183778560).

106521240 is an abundant number, since it is smaller than the sum of its proper divisors (261035880).

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

106521240 is a wasteful number, since it uses less digits than its factorization.

106521240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833 (or 829 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 106521240 is about 10320.9127503337. The cubic root of 106521240 is about 474.0368146022.

Adding to 106521240 its reverse (42125601), we get a palindrome (148646841).

The spelling of 106521240 in words is "one hundred six million, five hundred twenty-one thousand, two hundred forty".