102623521 has 32 divisors (see below), whose sum is σ = 138878208. Its totient is φ = 73232640.

The previous prime is 102623461. The next prime is 102623531. The reversal of 102623521 is 125326201.

It is not a de Polignac number, because 102623521 - 2⁷ = 102623393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102623492 and 102623501.

It is not an unprimeable number, because it can be changed into a prime (102623531) 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 31 ways as a sum of consecutive naturals, for example, 156831 + ... + 157483.

It is an arithmetic number, because the mean of its divisors is an integer number (4339944).

Almost surely, 2^102623521 is an apocalyptic number.

102623521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102623521 is a deficient number, since it is larger than the sum of its proper divisors (36254687).

102623521 is a wasteful number, since it uses less digits than its factorization.

102623521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 102623521 is about 10130.3267963082. The cubic root of 102623521 is about 468.1829966534.

Adding to 102623521 its reverse (125326201), we get a palindrome (227949722).

The spelling of 102623521 in words is "one hundred two million, six hundred twenty-three thousand, five hundred twenty-one".