15450 has 24 divisors (see below), whose sum is σ = 38688. Its totient is φ = 4080.

The previous prime is 15443. The next prime is 15451. The reversal of 15450 is 5451.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a nialpdrome in base 5.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (15451) by changing a digit.

15450 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99 + ... + 201.

It is an arithmetic number, because the mean of its divisors is an integer number (1612).

2¹⁵⁴⁵⁰ is an apocalyptic number.

15450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19344).

15450 is an abundant number, since it is smaller than the sum of its proper divisors (23238).

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

15450 is a wasteful number, since it uses less digits than its factorization.

15450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 15450 is about 124.2980289466. The cubic root of 15450 is about 24.9063160378.

Subtracting from 15450 its reverse (5451), we obtain a palindrome (9999).

It can be divided in two parts, 15 and 450, that added together give a triangular number (465 = T₃₀).

The spelling of 15450 in words is "fifteen thousand, four hundred fifty".