13021450 has 72 divisors (see below), whose sum is σ = 27775008. Its totient is φ = 4530240.

The previous prime is 13021433. The next prime is 13021451. The reversal of 13021450 is 5412031.

13021450 = 41² + 42² + ... + 339².

It is not an unprimeable number, because it can be changed into a prime (13021451) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 194317 + ... + 194383.

It is an arithmetic number, because the mean of its divisors is an integer number (385764).

Almost surely, 2^13021450 is an apocalyptic number.

13021450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13021450 is an abundant number, since it is smaller than the sum of its proper divisors (14753558).

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

13021450 is a wasteful number, since it uses less digits than its factorization.

13021450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 13021450 is about 3608.5246292633. The cubic root of 13021450 is about 235.2627211172.

Adding to 13021450 its reverse (5412031), we get a palindrome (18433481).

The spelling of 13021450 in words is "thirteen million, twenty-one thousand, four hundred fifty".