102449521 has 16 divisors (see below), whose sum is σ = 111006720. Its totient is φ = 94303440.

The previous prime is 102449507. The next prime is 102449537. The reversal of 102449521 is 125944201.

It is a cyclic number.

It is not a de Polignac number, because 102449521 - 2¹¹ = 102447473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102449521.

It is not an unprimeable number, because it can be changed into a prime (102449551) 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, 69490 + ... + 70948.

It is an arithmetic number, because the mean of its divisors is an integer number (6937920).

Almost surely, 2^102449521 is an apocalyptic number.

It is an amenable number.

102449521 is a deficient number, since it is larger than the sum of its proper divisors (8557199).

102449521 is a wasteful number, since it uses less digits than its factorization.

102449521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 102449521 is about 10121.7350785327. The cubic root of 102449521 is about 467.9182427738.

The spelling of 102449521 in words is "one hundred two million, four hundred forty-nine thousand, five hundred twenty-one".