106421523 has 16 divisors (see below), whose sum is σ = 153044640. Its totient is φ = 65389824.

The previous prime is 106421507. The next prime is 106421533. The reversal of 106421523 is 325124601.

It is not a de Polignac number, because 106421523 - 2⁴ = 106421507 is a prime.

It is a super-2 number, since 2×106421523² = 22651081115279058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 106421493 and 106421502.

It is not an unprimeable number, because it can be changed into a prime (106421533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29865 + ... + 33237.

It is an arithmetic number, because the mean of its divisors is an integer number (9565290).

Almost surely, 2^106421523 is an apocalyptic number.

106421523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

106421523 is a deficient number, since it is larger than the sum of its proper divisors (46623117).

106421523 is a wasteful number, since it uses less digits than its factorization.

106421523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4198.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 106421523 is about 10316.0807965041. The cubic root of 106421523 is about 473.8888494741. Note that the first 4 decimals are identical.

The spelling of 106421523 in words is "one hundred six million, four hundred twenty-one thousand, five hundred twenty-three".